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Hi Eugene. I am a big fan of your channel. However, in this video I saw a problem. At 02:00 you said the ship speed is same as light speed but the light ball is going faster than the ship in the animation which is contradictory with what you said. According to Shara’s point of view the light ball should not be moving faster than the ship in the animation. Please correct it or at least clarify if I am wrong. Thanks.
@@SazzadHissain It is not possible for an object with mass to travel at exactly the speed of light, but it is possible to get arbitrarily close to the speed of light. This is what I meant and this is why I show the light going slightly faster than the spaceship. Thanks.
@Eugene thanks for the clarification. It would be no confusing to audience if there would have been terms used like “almost same” instead of “equal”. Anyway, not a big deal. In your animations I found you extremely cautious about being scientifically consistent. I really appreciate your work. I would like to get videos about “shape of the universe” in future. ❤❤❤
In case, you have not already seen them, I uploaded several other videos within the past several days. As always, for each video that you like, you can help more people find it in their RUclips search engine by clicking the like button, and writing a comment. Thanks.
Eugene Khutoryansky Hi Eugene. These videos are great! The oft repeating themes/points really help integrate these non-intuitive consequences of relativity. I wonder if you'll be able to explain causality in regards of how traveling faster than light can result in your past contacting you making this scenario a impossibility with our Einsteinium knowledge of the universe. Thank you!
The Sandre Guy Yes, the narration is done by a friend of mine who is a professional voice actor. She also created the song for the "Journey of the Fireflies" video on my channel.
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What if Sarah starts walking away from Adam, and towards a real male who actually has the time and patience to care for her needs? Would Adam still be a douche and stay on that ship, playing with that STUPID ball, while this other dude steals his woman?
He wouldn’t know because time has essentially stopped and Sarah aged, married someone else, and died all in the time Adam blinked. He’s come back to Earth eventually and see Sarah is dead and it’d be too late to fix himself
just a thought: Cherenkov radiation. if electrons can travel faster than light in that medium; than all we have to do is find some particle than travels faster than light in a certain medium - like a warp bubble.
Andre Pascoa The speed of light (or rather, the speed of causality) is constant no matter the medium. Its just that the photons get absorbed and re-emitted constantly which effectively slows down light in a medium.
May I point out that if the ship is going at the speed of light, it doesn't matter if the time inside the ship is zero, Adam would be going (with the ship) at the speed of light. I suppose on thing to say is that this example is not feasible since the ship could not reach the speed of light according to the theory of relativity.
So...Adam's ship reaches the speed of light...How is it going to slow down? Adam is basically frozen in time, and so is the autopilot. He's gotta stay just below light speed for any of the ship's functions to actually work -- and work slowly, so RIP collision avoidance. Then, he get's where he's going, and realises that billions of years have passed back on earth, and he will never know how Game of Thrones ended. Still...it's better than what happened when he took the train. And a LOT better than what you go through at the airport.
@@lucasqwert1 Yeah, so actually who cares what Sarah sees, Adam is going to walk at normal speed from his pov so shouldn't he actually pass the speed of light? I know it isnt possible but this part wasnt explained
@@lucasqwert1 Adam sees that the whole universe is coming at him at light speed, so what happens for him when he steps forward, that would mean that everything is coming at him faster
Imagine you have 2 ships in 2 points of space. In some of your videos you showed how the universe is expanding and infinite. Thus one can know for sure that at some distance those 2 ships are 'moving' apart from each other greater than the speed of light. If you were on 1 ship and you could 'see' the other, would the relativistic effects still apply? Time and length would have negative values? Big fan of your work.
DisjoinedTech94 What I said in the other videos is that it is possible that the Universe is infinite. We don't know for sure whether it is or isn't. As for the expansion of the Universe, what is happening is that it is space itself that is expanding. One analogy is dots painted on a balloon that is being inflated. The dots are not moving on the surface of the balloon, but the distance between them is increasing. As for the question of what we would see if we looked at a galaxy who's distance from us is increasing faster than the speed of light, we would never see it, due to the fact that the light from it would never reach us.
What always confused me, is the (possibly) only thing I remember from Physics classes. IF I remember, it is the Lorentz transformations that play a bigger part in calculations as you accelerate towards C. Externally observed mass heads toward infinity, externally observed time passage slows toward zero, and externally observed length in the direction of travel heads toward zero. My (long, drawn-out) point is: I always thought the equations said nothing that has mass can be OBSERVED to be going as fast, or faster than C. NOT that nothing can go as fast, or faster than C. Opinions? Please feel free to tell me my mistake(s)!
Another fundamental question is, how can a ship reach the speed of light when speed is a relative concept; it has to be measured against another object. It will have the speed according to this other object and yet have another speed if compared to another object. So ok, let's pick a star that relatively stable distance from the ship at start of acceleration. How can one measure practicaly his ship's speed according to a distant star? With the Doppler effect? I don't think that's possible. What happens to Doppler effect when your ship reaches relativistic speed. Then there's always measuring the amount of energy you add to your ship that gets converted to movement and add the amount needed to get to 'c'. But then the equations already tells you you need infinite energy. My conclusion; I smell something fishy. And I personaly believe that infinity is a math concept and is impossible in the physical univers. So, to me, a lot of theory and not enough exerimentations yet. As to your question, I read that Einstein never said a non zero mass object can have a FTL speed. It's just that a non zero mass object cannot accelerate to C.
Since I couldn't find anywhere else to post a suggestion I will add one here. I really like your videos and enjoy the wonderful learning I receive from them. I would really enjoy seeing a video about Nuclear energy, fission and fusion and some fundamental nuclear physics laws. Thanks for the videos! Keep it up!
Thank you for this video! I still have a question about it and i would be very happy if you could answer it. Isn`t it true that lightspeed is the same maximum speed in every (!) reference frame? Now what happens if Adam turns on a flashlight inside the ship? How would adam see it? I believe that adam does not experience any time slowing, right? Is the slowing of time which sarah sees only an optical effect for her and not for him?
In Adam’s perspective, he is stationary and it is the rest of the universe moving backwards, which will look contracted for him. Time will feel and flow normally for Adam. If he turned on a flashlight, he would see the photons from it traveling at the speed of light.
ashish nigam I just replied to your comment on the Twin Paradox video. Yes, there is no way to prove who is moving, and that is one of the fundamental principles in the Theory of Relativity. Each observer is equally correct in believing that they are standing still, and that it is the rest of the Universe that is moving around them. We can't detect absolute motion. We can only detect the motion of one object relative to another object.
If the speed of the spaceship reaches the speed of light in vacuum then from Sarah's perspective the length of the spaceship will be zero according to the length contraction formula right? Then how is Sarah supposed to see Adam?
But what about length contraction, when i studied this my teacher used Lorentz contraction to explane this phenomenon. Does the slowing down of time work with Lorentz or are they just happening on the same time?
Stefnir Húni Kristjánsson Lorentz contraction and the phenomena shown in this video up above always occur together. Although I didn't mention it in this video, I discussed Lorentz contraction in my main video on Relativity.
Eugene Khutoryansky Thank you for the answer and the quick reply :). btw love your videos its nice to see physics in such a visual manor instead of text and equations.
So you are saying that when object is moving close to speed of light, time reduce to almost frozen in that object at the eye of observer. Then how can observer seeing that object moving so fast from point A to point B? And if we can see the "clock" on the photon itself, which is moving at speed of light, will we see that it freezes time on itself? So how long do we see it take for the flying object to take to travel A to B?
innerlocus Yes, no matter how far the photon traveled through empty space, from the photon's perspective, it traveled a distance of zero meters in zero seconds.
Eugene Khutoryansky But you can't say that. There simply aren't any reference frames in which a photon could be said to be at rest in. Timelike reference frames do not exist.
Hello, I have a doubt. What if we look at it another way. Sub atomic particles in particle accelerators travel at more than 99.99% the speed of light. what if we add that to the speed at which earth orbits the sun? Great video again, thanks.
Nev Bruh From Adam's perspective it's only going 10 meters per second. Remember, from his perspective he is standing still and it's the universe that is moving. From Sarah's perspective the ball is barely moving since she see's Adam's time to be nearly frozen.
Nev Bruh That's exactly what is explained in this video. From Adam's point of view (or anything inside the ship) his spaceship is not moving, so the rolling ball would be rolling at a normal speed from anyone's perspective inside the ship. Anyone else outside the ship would see it rolling extremely slow.
Amer Amodi It's relative. The Sun is moving in relation to Earth from the perspective of those on Earth. From the perspective of the Sun, the particles and those on Earth, time is slowed down so that it the speed of the particles appear less than the 99.99% that we would see on Earth.
Nev Bruh It would be somewhere between the speed of the spaceship and the speed of light. Much closer to the speed of the spaceship. Look up relative velocity for the equation. You will find that even everyday objects are moving ever so very slightly slower from someone else's perspective than from yours.
What about Adam's perspective of the outside world? When he looks out the window as he walks inside the ship which is traveling near light speed, what does he see?
Shahin Goddousi From Adam's point of view, it is the rest of the Universe that is moving, and he therefore sees everyone else's clocks as going slower. Also, due to Lorentz contraction, he views the rest of the Universe as having contracted in length. This is covered in detail in my main video on Einstein's Theory of Relativity.
Why Adams motion alone is dilated, even the spaceship is also moving at a speed nearer to c, why doesn't the movement of the spaceship appears to be dilated
So, if there's a spaceship going at the speed of light, and I switch on a bulb at the tail end of the spaceship, the light will never reach the front end?
It will. And it will pass it at the speed of light. Thats the thing with relativity, from your point of reference you will never be able to outrun light. But an outside observer like Sarah would see what you described.
Assuming spaceship is moving close to light speed &1 second on spaceship is equal to 10 seconds on Sarah's clock. In 10 seconds spaceship would have travelled 10 light seconds. What speed will Adam calculate? 10 light seconds in 1 second, that would be 10 times speed of light?
Since I wrote on your quantum theory video, that I love your simulated cat, youtube started perpetually showing me cat food advertising. This is so spooky :D:D:D
Completely rhetorical question born out of curiosity.... If Adam is moving near the speed of light, how does Sarah have enough 'time' to determine whether or not Adam even 'exists' within the spaceship, let alone being able to perceive the presence of the spaceship...
I have a question when spaceships goes at exact speed of light Sarah will see Adam is not moving but according to Adam perspective he can't move his leg . he stops thinking as he is travelling with speed of light does this is true
This thing drive me crazy. how can two events different at the different places.The light coming from the spaceship which make sarah to view adam's activities ,tell her exactly what is happening in the spaceship at same rate. what is going on there? ?
At 2:05 if the ship is moving as fast as light, why is the photon outrunning the ship?? I get thet from sara’s perspective, adam isn’t moving due to time being stopped, and therefore light outruns adam. But it shouldn’t outrun the ship right?
But these "problems" with violating light speed are really a problem with the amount of time it takes the light from Adam's image to reach Sarah. Just because Adam "appears" to be walking slow or standing still does not mean that he actually IS!!! Right?? I know I don't understand like some of you, which is Exactly why I am trying to learn this!! when he throws the ball....the spaceship "appears" to be standing still but it actually is Not...right?? So wouldn't that mean he Could have beaten light speed but it just wouldn't Appear that way to observers due to the additional time it takes for the light of the image to reach Sara or whoever. I mean, if he walks forward he is not Actually gonna be walking super slow or standing still....it just Appears that way. Or No??
"it actually is Not" = in his reference frame, he's not perceiving himself as moving slowly, yes. That's "relativity" : each one its own reference. And also yes, there is the light, carrying the information about Adam walking, that will have some time to travel until Sarah's eye. Even with a classical mechanic thinking, the slowdown image is evident : during the couple seconds of adam throwing a ball, he'll have travelled roughly earth-moon distance. Sarah is not moving, at mid distance of earth and moon. She suddendly receive a lot of "blue adam" (due to blue shifting of light) coming. Then, being next to him she'll have a normal colored adam, but as static image (like a camera's picture). Then when he move away, she see a red adam (redshift). During the blue shift, adam will appear to quickly start to launch a ball, and in the redshift he'll appears to very slowly finish to launch the ball. The vulgarization of physics is tricky because the light does not move instantaneously from adam and sarah to the youtube screen ! I'm not sure, but maybe we can't perceive FTL even if it was happening through electromagnetism.
That's what Sarah would see and record as happening. The same way, if a star 50 light years from earth exploded, when we saw it we would record that the star exploded today. But on "Observer" on another "planet" 25 light years from the star, would have record that the star exploded 25 years ago.
I understand that when Adam looks outside that time is slowed and the universe looks contracted. Just as he begins walking at 1kph forward (relative to the ship) while the ship moves at 1kph less than light speed (relative to the outside), does he then see the universe contract from non-zero to zero length? And if he walks at 2kph, what does he see ouside then? Does the universe stretch in the opposite direction? Do outside clocks appear to go in reverse?
Shahin Goddousi Well, he walking 1 kilometer per hour faster relative to the ship will, in Sara's point of view, just add 2 × 10⁻⁹ meters per seconds to his velocity. Thing is, he'll _never_ reach light speed.
What if adam shines a laser forwards instead of walking/throwing ball? Would the laser to adam move forwads at the speed of light? What would Sarah see?
interesting, so you cant go faster because the faster you go the slower the time passes for you hence you'd be seeing the ball go faster than it "actually" is because for you X seconds would have passed but from the outside it would have been like X.1/10000 of a second? That means that there could be different parts of the universe "going" at different speeds of time relative to each other no? just one question. what if we stand still and send one object at the speed of light to the right and another also at that speed to the left? we would see each of them going slow and at 0.9999C but what would they see when they see each other? would it be like when you are on a train and another passes by in the opposite direction looking as if going twice as fast? (2C / its time passing twice as fast as the one standing still's)
Laharl Krichevskoy Yes, time in different part of the Universe can be moving at different speeds. In reply to your other question, if you throw a ball at almost the speed of light towards a space ship that is headed toward you at almost the speed of light, the person in the space ship will still see the ball as moving slower than the speed of light. This is due to the fact that from his perspective, he is the one who is standing still, and it is you who are moving towards him at almost the speed of light. Therefore, he will think that it is time for you which is moving slowly, and that you are therefore moving your arms very slowly when you throw the ball towards him, similarly to how Adam was seen by Sarah as throwing the ball very slowly.
Well sr was not violated for Sarah or Adam, but it was violated for us at 2:01 when the photon passed a space ship moving at speed of light hahaha! Great video I love your content
Actually, anything with mass (such as a spaceship) can never reach the speed of light, but it can arbitrarily close to the speed of light, and this is what I meant to say. Thanks.
@@EugeneKhutoryansky I know it does sound weird to me as well but the example stated "if the ship travels at the speed of light" (if you go click at 2:01 you will see it actually written and spoken) haha it's a funny mistake indeed, but ofc I'm by no means implying that you did not know this! Just thought it was a little funny moment lol
@@charlesbaoumar6087 In this case actually Adam was supposed to move at the speed (tending to the speed) of light, and the spaceship - slightly slower than Adam's!
@@rdengin you're right! It's because she said "equal" even though it should be "approaching". My apologies for the misunderstanding Mrs Eugene my understanding was still premature but grew thanks to you formidable work! The best physics content on the internet by far!!!!!!!!!!!!!
what if two spaceships would fly at each other at the exact opposite flight directions and each spaceship is moving at the speed of light doesn't it mean that the relative velocity of those ships is 2*C?
I read some pages on a book and some other references regarding time travel, it says that time travel is possible if we can build a time machine that can travel faster than speed of light so my question here is: Is it true that if you travel faster than speed of light you will be travel back in time? my point here is time travel to the past
+Jet Cannon u need to understand lorentz transformation equation for that. its not that easy or intuitive thing unless you are really passionate about math and physics
Like varun swamy said, you have to understand the Lorentz transformation. But the equation isn't that tough to understand. For any moving object, you multiply its time, its length, and its mass by 1/√(1-v^2/c^2), where v is your velocity and c is the speed of light. As you can see, once your velocity equals c, then you end up dividing by zero, so everything pretty much breaks down there. And if your velocity is *greater* than c, then you end up with an imaginary number in the denominator, which isn't much better. And even if you ignore all that and just say "v greater than c equals negative time! So that must mean traveling into the past!" it still doesn't make much sense. That's also the factor by which your length contracts, so do you start to stretch out when you go faster than c? Or do you just gain negative length? What does that mean? And negative mass too? Not a very promising time machine.
what if you had two quantum entangled particles one on the spaceship and one on the earth and he fires a particle forward effecting the spin of the entangled particle which instantly effecting the other particle so in his time frame he send a particle at the speed of light forward and Sarah recorded the time when the quantum spin state changed and then could add both his speed plus the speed of light together doubling it does this work?
Guys I have a question. Suppose Adam and Sarah are both sitting in spaceships, and they both start to move very close to the speed of light, in opposite directions. Now to us, the third viewer, both of them individually are moving close to the speed of light (Let's call this speed c`). But let's say there is nothing else in the universe other than sarah and adam and their spaceships. Now, Adam is right to believe that his spaceship is standing still, but when he sees Sarah's spaceship, he sees her spaceship go 2c`, which is much higher than the speed of light, hence, violating Einstien's theory of relativity. Any thoughts?
+saksham chauhan That's an interesting question. I'm figuring that in this scenario, for both, Adam and Sarah, the length of the universe would contract to nearly zero - and since speed is measured as travelled distance in time, they would actually measure a speed close to zero. In the extreme scenario, if you replace them by light particles, from the perspective of the light particles, they would stay at the same place and wouldn't be moving at all (since the whole universe would be of size zero and the definition of space actually ceases to exist) And now my mind is twisted - I should probably go to bed ;-)
+saksham chauhan But its the same for sarah. If there is nothing else but her, adam and their spaceships both. They are both moving at speed c` from one another not 2c` From a third observer they see both ships travel at the same speed (almost 0). So Adam's ship speed = c` = Sarah's ship speed. From Adams point of view, his ship has been standing still for this whole duration and therefore sarahs ship hasnt moved at double speeds. she has been moving at exactly c` like she always have.
+saksham chauhan it makes me think that nothing with mass can go 1/2 of c wrt anything else with mass in the vicinity for that reason. meanwhile the distant galaxies are alleged to go faster than light from our perspective though we can't actually see them so they practically aren't breaking the rule because no one really can catch them. "what you don't know can't hurt you." "you'll have to catch me first."
If the spaceship is travelling at the speed of light, Adam will not move for Sarah, so he can't go faster than light. Ok, but the spaceship is already flying at the speed of light. Isn't it violating the relativity? it was just a fictional situation, because It's not possible to travel at the speed of light, right?
Rodrigo Appendino Well, problem is, he can't. It's simply nonsensical to say that something "travels at the speed of light," unless it's a massless particle.
Great vid as always! :) A glass plate's thickness dictates the amount of reflected light. Some light scatters from the upper surface, some from the lower surface. According to QED, the upper surface reflection is affected by the distance to the lower surface. Since the upper surface appears to instantaneously know the distance to the lower surface, here is my attempt: A veeery thick glass plate with a variable thickness mechanism is placed between two planets. Light is shone on the upper surface and the amount of reflection is detected there. Could another person with the variable thickness control, on the other side of the glass plate, send instant morse signals in reflectivity?
time = motion. no motion = you stopped the time. you replay the motion in reverse manner = you reversed time. and the same for fast forwarding time. living organisms are hard to predict because their motion depends on brain decisions and not solely by the law of physics to get to a certain point.
If we want to go "faster" than light, we stay still and expand and contract the SPACE around the ship because space can do what ever it wants. That is how the warp engines in Star Trek work. Expand space behind, contract space in front. And that's how to get to Alpha Centauri, 4.37 light years away, in a matter of weeks.
+Cameron Hawkins Using the warp drive also wouldn't lead to any time dilation so you could return to Earth without everyone you know aging dramatically.
Time slows the closer you approach the speed of light according to mass. (the more mass the slower) Light has no mass (or almost), which is why the higgs boson particle can exeed the speed of light. (it has no mass)
+Apoorva Gupta watch lecture series by prof. shiva prasad from iit bombay on special theory of relativity. trust me, if u give some time to it, u will def understand it from this lecture series. all confusing things are explained quite intuitively and comprehensively
can someone answer me please :one of the rules : that the speed of light is equale for all observors... but in the video here adam is at very fast speed and he sees the light as its moving sloweky not on the speed of light !! so for adams point of view the light is moving with a little speed which disagree the rule !can someone explaine please
Adam still sees the ball of light moving at the regular speed of light. This is because to measure this speed, he needs to use his clock inside the spaceship, and from the perspective of everyone outside this spaceship, his clock is running very slowly.
@@EugeneKhutoryansky i still didnt get it sorry...i think i need to understand the nature of light first before getting to understand this but anyway thanks for the quick respond i appreciate it
Thanks for reply In your video u says that adam is in spaceship and he throughs the ball forward(or walk forward). In my queastin adam is in space ship but sara through tha ball backward(or walk backward). According the theory, sara feels that adam's time is moving slow so adam feels that sara's time is moving fast. And if sara through the ball backward(or walk bacward), Due to fast moving time, ball is going fast. So according to adam's view sara is moving backward nearly the speed of light and through the ball backward so ball is going faster than light.
ashish nigam No, Adam does not view Sarah's time as moving fast. Adam sees Sarah's time as moving slowly. Both Adam and Sarah view the other person's clock as moving slower than their own. If this were not the case, then it would be possible to tell who is moving, which would violate the founding principle of Einstein's Theory of Relativity.
Eugene Khutoryansky then according to photon perspective i m going with the speed of light and my clock's tick stop. And if sara and adam both feel that other person's time slower than thair own so both feel that they r older than other. Then who is in future relative to other. And if i wish go into future so if i will go with speed nearly to light then i will see that others person's clock slower than me so they will going in future not i. And according to others i m in future. Totly contradictid. Is there r any proof of ttheory of relativity???????
ashish nigam I cover that question in detail in my "Twin Paradox" video. You can find it in the links at the end of the video up above, or from my RUclips home page. Thanks.
2:00 When spaceship moves at the speed of light Sarah won't see Adam always moving slower, than the speed of light. She will see him moving at the speed of light.
Objects with mass can never travel at exactly the speed of light, but they can get arbitrarily close to the speed of light, and that is what I was referring to.
If sara through the ball in opposite direction of adam. Since sara's time faster than adam. And according to adam's perspectiive he is still and sara is moving nearly the speed of light and she throughs a ball and her time faster than adam then it looks like ball is going faster than light (according to adam's perspective). And according the logic of twin paradox sara's time never slower than adam's
And if u say from adam's perspective that sara's time go slower then adam's then it is again creat twin paradox. And sorry for my english Waiting for your answer
ashish nigam I am not sure if I understood your question properly. From Adam's perspective, he is standing still. Therefore, no matter what direction he throws the ball, he will always think that the ball is moving much slower than the speed of light. If this doesn't answer the question you were trying to ask, please let me know.
Adam's clock is slowing down because the photon is having a longer distance to travel to reach the detector. Firing photons from both directions towards the middle and comparing the differences in frequencies will fix the problem.
@@EugeneKhutoryansky its the same phenomenon. You are still making the same mistake. The photon from the center ship will reach the trailing ship first as that ship is moving to meet it.
I have a real clever idea to violate the principle. Adam just has to slow down his clock even more. For exampl,e if he lets his clock run at half speed then his clock will slow down twice as much as he does meaning that time will slow twice as much as he does meaning that his decrease in speed will be only half as much. If he makes his clock run 100 times slower than Adam will only slow down by 1/100th of the normal slow down. This might allow him to walk faster than the speed of light.
Unfortunately, the speed at which his clock ticks is directly related to his velocity. Adam cannot alter the rate of time on his clock without changing the speed of the spaceship
2:01 "If the ship's speed EQUALS the speed of light, Sarah will see time inside the spaceship stop completely, and she will see Adam's walking speed decrease to zero. Therefore, Sarah will always see Adam moving SLOWER than the speed of light." So the ship EQUALS the speed of time. Even if Adam keeps sitting or standing, Sarah will see Adam moving together with the spaceship AT the speed of light. Isn't it? If not please explain why. And BTW, you forgot to mention that if the ship's speed EQUALS the speed of light, it will have to stand against all the (extreme blue shifted -> gamma) radiation of the whole universe at once, since the distance shrinked to zero. IMO this is the challenge we will never ever be mastering, even if we are able to reach 99,9% of the speed of light.
The speed of the spaceship can never actually reach the speed of light, due to the fact that the spaceship has mass. But the spaceship can approach arbitrarily close to the speed of light, and that is really the scenario I was referring to.
If Adam decides to throw a ball out of his spaceship, then... HE WILL DIE OF VIOLENT DECOMPRESSION before he even release the ball !!!! :( I thought this is suppose to be teaching us proper physics !! Jokes, I love the video, you have done a great job, please keep it up. :D But the non-sense is something you might want to avoid...
1 what if the speed of light =photon never heard about Albert and ignores his idea about. 2 what if Sarah shins like the sun and Adam is watching at her with a mirror in front of him. 3 what if Adam decides to continue accelerating? can Adam still see the photon from Sarahs face? 4 is it possible that Sarah still sees Adam and Adam cannot see her simply because he travels relatively to Sarah faster than C. 5 is it true that C is the limit?
The time dilation needed to make this explanation work only happens if it's assumed that the speed of light is an upper limit. We have to assume what it is that we are trying to prove.
There's a small inconsistency at 2:07, I think. If the spaceship is moving at the speed of light (assuming that's possible), then the photon should not be moving forward in the animation (ie. moving faster than the spaceship).
The spaceship is not moving at the speed of light, because objects with mass can never reach the speed of light. But, they can get arbitrarily close to the speed of light, and that is what I was trying to show. Thanks.
@@EugeneKhutoryansky You're right of course, and it's clear to me that that's the point you were making. It's just that the video explicitly explores the scenario where the spaceship travels at the speed of light (surely because it was necessary to show that you can't (theoretically) make a step forward at all at the speed of light to break it). Assuming that this was possible however, the photon should be moving at the same speed as the ship. Also, let me take this opportunity to say that I've been watching your amazing videos throughout the years and they really helped me better understand physics! I really appreciate your work, thank you so much! 😊
+Venum Nope. Adams perspective is an illusion based on the fact that time is slowed down for him. What sarah sees is the true perspective, adam is moving slower the closer he gets to lightspeed because time is slowed down, and the slowdown is always just enough so that you cannot surpass lightspeed.
+David Burke, Adam's perspective is just as valid as is Sarah's perspective. But, from Adam's perspective, his ship was standing still the entire time. Therefore, from his perspective, neither he nor his ball ever even got close to the speed of light.
+SpeedyHD Nope. Light always moves at exactly the same speed for all observers. In Einstein's relativity, speeds don't just add like they do in Newton's mechanics.
stephen lang It's hard to imagine, isn't it. It's something so far beyond our experience if probably why. But there is a lot of modern technology that relies on this principle. GPS, for example, relies on atomic clocks on board satellites that give very precise measurements of when the signal from your phone or devise arrives. If they didn't compensate for time dilation, the reading you'd get for your position would drift several miles each day.
lewiszim Yeah but time coming to a complete standstill is still not possible. I remember an episode of the Twilight Zone where they had a stopwatch that stops time.The Man that got it used it to play practical jokes on People. And then there was an episode of the Simpsons where Bart Simpson used the same type of stopwatch to play practical jokes on His Dad. But that's just fantasy.
Eugene, your gravity videos have been great. This video is good too. However, your video where you explain how time dilation is what is felt as gravity isn't as good lol. You represent 2 spatial dimensions and 1 time dimension in that video and you say that the time dilation is what causes the object to start moving toward the earth. This is difficult to understand. It's not as clearly explained as your other vids on gravity and this vid on the speed of light. I think you should try to re-explain it in an easier way to understand. Good luck. Having said that, I like a lot of your videos I think you simulate things very well. If Einstein were around, I would say he would be pleased with your gedanken presentations :)
❤ #Sacrament #ThePathsJesusWalked 2Nephi31:20 20 wherefore ye must press forward with a steadfastness in Christ having a perfect brightness of hope and a Love of God and of all men WHEREFORE If he shall press forward feasting upon the word of Christ and Endure to the end behold thus dairy the father He shall have eternal Life 3Nephi27:20 20 Now this is the commandment #Repent all ye ends of the earth and come unto me and be #baptized in my name that ye may be #sanctified by the reception of the Holy Ghost that ye may stand #spotless before me at the last day. Moro4:3 3 O God the Eternal Father we ask thee in the name of thy Son Jesus Christ to bless and sanctify this #bread to the souls of all those who partake of it that they may eat in #remembrance of the body of thy Son and witness unto thee O God the Eternal Father that they are willing to take upon them the #Name of thy Son and always remember him and keep his commandments which he hath given them that they may always have his #Spirit to be with them Amen. Moroni5:2 2 O God the Eternal Father we ask thee in the name of thy Son Jesus Christ to bless and sanctify this #wine to the souls of all those who drink of it that they may do it in remembrance of the #BloodOfThySon which was shed for them that they may witness unto theeO God the Eternal Father that they do always remember him that they may have his Spirit to be with them Amen. Moroni10:33. 33 And again if ye by the grace of God are perfect in Christ and deny not his power then are ye #SanctifiedInChristByTheGraceOfGod through the shedding of the #BloodOfChrist which is in the covenant of the Father unto the remission of your sins that ye become #HolyWithoutSpot 39 Now this change was not equal to that which shall take place at the last day but there was a change wrought upon them insomuch that Satan could have no power over them that he could not tempt them and they were #SanctifiedInTheFlesh that they were #holy and that the powers of the earth could not hold them. 2Ne2:10 10 And because of the intercession for #all, all men come unto God; wherefore, they stand in the presence of him, to be #judged of him according to the truth and #holiness which is in him. Wherefore, the ends of the law which the Holy One hath given, unto the inflicting of the #punishment which is affixed, which punishment that is affixed is in opposition to that of the happiness which is affixed, to answer the ends of the #atonement 2Ne31:20 20 ดังนั้นท่านต้องมุ่งหน้าด้วยความแน่วแน่ในพระคริสต์โดยมีความเจิดจ้าบริบูรณ์แห่งความหวังและความรักต่อพระผู้เป็นเจ้าและต่อมนุษย์ทั้งปวงดังนั้นหากท่านจะมุ่งหน้าดื่มด่ำพระวจนะของพระคริสต์และอดทนจนกว่าชีวิตจะหาไม่ ดูเถอะพระบิดาตรัสดังนี้เจ้าจะมีชีวิตนิรันดร์ 3Ne27:20 ๒๐ บัดนี้นี่คือบัญญัติจงกลับใจเจ้าทั้งหลายทั่วสุดแดนแผ่นดินโลกและมาหาเราและรับบัพติศมาในนามของเราและเจ้าจะได้รับการชำระให้บริสุทธิ์โดยการรับพระวิญญาณบริสุทธิ์เพื่อเจ้าจะยืนอยู่โดยไม่มีมลทินต่อหน้าเราในวันสุดท้าย Moro4:3 ๓ ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์พวกข้าพระองค์ทูลขอพระองค์ในพระนามของพระบุตรของพระองค์พระเยซูคริสต์โปรดประทานพรและทำให้ขนมปังนี้ศักดิ์สิทธิ์แก่จิตวิญญาณของเขาทั้งหลายผู้ที่รับส่วนเพื่อพวกเขาจะรับประทานในความระลึกถึงพระวรกายของพระบุตรของพระองค์และเป็นพยานต่อพระองค์ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์ว่าพวกเขาเต็มใจรับพระนามของพระบุตรของพระองค์และระลึกถึงพระองค์ตลอดเวลาและรักษาพระบัญญัติของพระองค์ซึ่งพระองค์ประทานให้พวกเขาเพื่อพวกเขาจะมีพระวิญญาณของพระองค์อยู่กับพวกเขาตลอดเวลาเอเมน Moro5:2 ๒ ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์พวกข้าพระองค์ทูลขอพระองค์ในพระนามของพระบุตรของพระองค์พระเยซูคริสต์โปรดประทานพรและทำให้เหล้าองุ่นนี้ศักดิ์สิทธิ์แก่จิตวิญญาณของเขาทั้งหลายผู้ที่ดื่มเพื่อพวกเขาจะทำในความระลึกถึงพระโลหิตของพระบุตรของพระองค์ซึ่งหลั่งเพื่อพวกเขาเพื่อพวกเขาจะเป็นพยานต่อพระองค์ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์ว่าพวกเขาระลึกถึงพระองค์ตลอดเวลาเพื่อพวกเขาจะมีพระวิญญาณของพระองค์อยู่กับพวกเขาเอเมน Moroni10:33 ๓๓ และอนึ่งหากท่านโดยพระคุณของพระผู้เป็นเจ้าดีพร้อมในพระคริสต์และไม่ปฏิเสธเดชานุภาพของพระองค์เมื่อนั้นท่านย่อมได้รับการชำระให้บริสุทธิ์ในพระคริสต์โดยพระคุณของพระผู้เป็นเจ้าผ่านการหลั่งพระโลหิตของพระคริสต์ซึ่งมีอยู่ในพันธสัญญาของพระบิดาอันนำไปสู่การปลดบาปของท่านทำให้ท่านกลับบริสุทธิ์ปราศจากมลทิน 2Ne28:39 ๓๙ แล้วการเปลี่ยนแปลงนี้ไม่อาจเทียบได้กับการเปลี่ยนแปลงที่จะเกิดขึ้นในวันสุดท้าย แต่เกิดการเปลี่ยนแปลงกับพวกท่านถึงขนาดที่ซาตานจะมีอำนาจเหนือพวกท่านไม่ได้คือเขาจะล่อลวงพวกท่านไม่ได้และพวกท่านได้รับการชำระให้บริสุทธิ์แล้วในเนื้อหนังจนพวกท่านบริสุทธิ์และจนพลังของแผ่นดินโลกจะยึดพวกท่านไว้ไม่ได้ 2Ne2:10 ๑๐ และเพราะการวิงวอนแทนคนทั้งปวงมนุษย์ทั้งปวงมาสู่พระผู้เป็นเจ้าดังนั้นพวกเขายืนอยู่ในที่ประทับของพระองค์เพื่อรับการพิพากษาของพระองค์ตามความจริงและความบริสุทธิ์ที่มีอยู่ในพระองค์ดังนั้นเจตนารมณ์ของกฎซึ่งพระผู้บริสุทธิ์ประทานให้เพื่อทำให้เกิดการลงโทษซึ่งมาพร้อมกฎซึ่งการลงโทษที่มาพร้อมกฎนั้นเป็นการตรงกันข้ามกับสิ่งที่เป็นความสุขซึ่งมาพร้อมกฎเพื่อสนองตอบเจตนารมณ์ของการชดใช้ #PrayAlways in the name of Jesus Christ amen #LoveTheEssenceOfTheGospel Nu15 kku22 Papada Oonmueangpia Bunthariga Oonmueangpia Lumpoon Tanapoomchai Wrd June14,2023,8:53 PM
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Hi Eugene. I am a big fan of your channel. However, in this video I saw a problem. At 02:00 you said the ship speed is same as light speed but the light ball is going faster than the ship in the animation which is contradictory with what you said. According to Shara’s point of view the light ball should not be moving faster than the ship in the animation. Please correct it or at least clarify if I am wrong. Thanks.
@@SazzadHissain It is not possible for an object with mass to travel at exactly the speed of light, but it is possible to get arbitrarily close to the speed of light. This is what I meant and this is why I show the light going slightly faster than the spaceship. Thanks.
@Eugene thanks for the clarification. It would be no confusing to audience if there would have been terms used like “almost same” instead of “equal”. Anyway, not a big deal. In your animations I found you extremely cautious about being scientifically consistent. I really appreciate your work. I would like to get videos about “shape of the universe” in future. ❤❤❤
@@SazzadHissain Thanks. I already have a video on the shape of the Universe at ruclips.net/video/IFdfrtzo4SY/видео.html
In case, you have not already seen them, I uploaded several other videos within the past several days. As always, for each video that you like, you can help more people find it in their RUclips search engine by clicking the like button, and writing a comment. Thanks.
Eugene Khutoryansky Hi Eugene. These videos are great! The oft repeating themes/points really help integrate these non-intuitive consequences of relativity.
I wonder if you'll be able to explain causality in regards of how traveling faster than light can result in your past contacting you making this scenario a impossibility with our Einsteinium knowledge of the universe. Thank you!
LostLucidity I'll put that on my list of future videos to make. Thanks for the suggestion.
Eugene Khutoryansky Each as brilliant as the last
Eugene Khutoryansky Is it a friend of yours who does the voiceover?
The Sandre Guy Yes, the narration is done by a friend of mine who is a professional voice actor. She also created the song for the "Journey of the Fireflies" video on my channel.
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Thanks.
What if Sarah starts walking away from Adam, and towards a real male who actually has the time and patience to care for her needs? Would Adam still be a douche and stay on that ship, playing with that STUPID ball, while this other dude steals his woman?
He wouldn’t know because time has essentially stopped and Sarah aged, married someone else, and died all in the time Adam blinked. He’s come back to Earth eventually and see Sarah is dead and it’d be too late to fix himself
Sarah is Adam's big sister. He would be okay with it.
but i still love the way she turns her head everytime she feels adam coming
At least she did not escape in a spaceship with the fantasies of moving faster than light after their mother died.
Couldn't help but hear sarcasm in your voice when you said the word clever :)
just a thought: Cherenkov radiation. if electrons can travel faster than light in that medium; than all we have to do is find some particle than travels faster than light in a certain medium - like a warp bubble.
It'll still be slower than speed of light in vacuum so it'd be the same as going below the speed of light
Since the speed of light in vacuum is at its peak while in a medium it is slower
Andre Pascoa The speed of light (or rather, the speed of causality) is constant no matter the medium. Its just that the photons get absorbed and re-emitted constantly which effectively slows down light in a medium.
Love your videos. Very well made and I prefer this over text on a page:
Sam Thanks. I am glad to hear that you like my videos.
Excellent video, thanks for making them.
blake301987 Thanks. I am glad you like them.
May I point out that if the ship is going at the speed of light, it doesn't matter if the time inside the ship is zero, Adam would be going (with the ship) at the speed of light. I suppose on thing to say is that this example is not feasible since the ship could not reach the speed of light according to the theory of relativity.
So...Adam's ship reaches the speed of light...How is it going to slow down? Adam is basically frozen in time, and so is the autopilot. He's gotta stay just below light speed for any of the ship's functions to actually work -- and work slowly, so RIP collision avoidance. Then, he get's where he's going, and realises that billions of years have passed back on earth, and he will never know how Game of Thrones ended.
Still...it's better than what happened when he took the train. And a LOT better than what you go through at the airport.
From Adams point of view, time is not standing still but normal.
@@lucasqwert1 Yeah, so actually who cares what Sarah sees, Adam is going to walk at normal speed from his pov so shouldn't he actually pass the speed of light? I know it isnt possible but this part wasnt explained
@@lucasqwert1 Adam sees that the whole universe is coming at him at light speed, so what happens for him when he steps forward, that would mean that everything is coming at him faster
Imagine you have 2 ships in 2 points of space. In some of your videos you showed how the universe is expanding and infinite. Thus one can know for sure that at some distance those 2 ships are 'moving' apart from each other greater than the speed of light. If you were on 1 ship and you could 'see' the other, would the relativistic effects still apply? Time and length would have negative values? Big fan of your work.
DisjoinedTech94 What I said in the other videos is that it is possible that the Universe is infinite. We don't know for sure whether it is or isn't. As for the expansion of the Universe, what is happening is that it is space itself that is expanding. One analogy is dots painted on a balloon that is being inflated. The dots are not moving on the surface of the balloon, but the distance between them is increasing. As for the question of what we would see if we looked at a galaxy who's distance from us is increasing faster than the speed of light, we would never see it, due to the fact that the light from it would never reach us.
Great videos,very educational and simple,can you do a video about integrals and how do they work in physical equations?
Thanks for the compliment. I already have a video on integrals. That is the video titled "Calculus -- The foundation of modern science" Thanks.
What always confused me, is the (possibly) only thing I remember from Physics classes. IF I remember, it is the Lorentz transformations that play a bigger part in calculations as you accelerate towards C. Externally observed mass heads toward infinity, externally observed time passage slows toward zero, and externally observed length in the direction of travel heads toward zero.
My (long, drawn-out) point is:
I always thought the equations said nothing that has mass can be OBSERVED to be going as fast, or faster than C. NOT that nothing can go as fast, or faster than C.
Opinions? Please feel free to tell me my mistake(s)!
Another fundamental question is, how can a ship reach the speed of light when speed is a relative concept; it has to be measured against another object. It will have the speed according to this other object and yet have another speed if compared to another object. So ok, let's pick a star that relatively stable distance from the ship at start of acceleration. How can one measure practicaly his ship's speed according to a distant star? With the Doppler effect? I don't think that's possible. What happens to Doppler effect when your ship reaches relativistic speed. Then there's always measuring the amount of energy you add to your ship that gets converted to movement and add the amount needed to get to 'c'. But then the equations already tells you you need infinite energy. My conclusion; I smell something fishy. And I personaly believe that infinity is a math concept and is impossible in the physical univers. So, to me, a lot of theory and not enough exerimentations yet.
As to your question, I read that Einstein never said a non zero mass object can have a FTL speed. It's just that a non zero mass object cannot accelerate to C.
Since I couldn't find anywhere else to post a suggestion I will add one here. I really like your videos and enjoy the wonderful learning I receive from them. I would really enjoy seeing a video about Nuclear energy, fission and fusion and some fundamental nuclear physics laws.
Thanks for the videos! Keep it up!
Jake White Yes, nuclear physics is on my list of topics that I plant to do videos on. Thanks.
Thank you for this video! I still have a question about it and i would be very happy if you could answer it. Isn`t it true that lightspeed is the same maximum speed in every (!) reference frame? Now what happens if Adam turns on a flashlight inside the ship? How would adam see it? I believe that adam does not experience any time slowing, right? Is the slowing of time which sarah sees only an optical effect for her and not for him?
In Adam’s perspective, he is stationary and it is the rest of the universe moving backwards, which will look contracted for him. Time will feel and flow normally for Adam. If he turned on a flashlight, he would see the photons from it traveling at the speed of light.
Nice video
Please reply on twin paradox's video
I m very curious to know
ashish nigam I just replied to your comment on the Twin Paradox video. Yes, there is no way to prove who is moving, and that is one of the fundamental principles in the Theory of Relativity. Each observer is equally correct in believing that they are standing still, and that it is the rest of the Universe that is moving around them. We can't detect absolute motion. We can only detect the motion of one object relative to another object.
Great video once again. You send a lot of amazing videos lately eugene cant wait for the next one!!
adam will also be contracted and so will the spaceship, which makes moving forward slower
If the speed of the spaceship reaches the speed of light in vacuum then from Sarah's perspective the length of the spaceship will be zero according to the length contraction formula right? Then how is Sarah supposed to see Adam?
But what about length contraction, when i studied this my teacher used Lorentz contraction to explane this phenomenon. Does the slowing down of time work with Lorentz or are they just happening on the same time?
Stefnir Húni Kristjánsson Lorentz contraction and the phenomena shown in this video up above always occur together. Although I didn't mention it in this video, I discussed Lorentz contraction in my main video on Relativity.
Eugene Khutoryansky Thank you for the answer and the quick reply :). btw love your videos its nice to see physics in such a visual manor instead of text and equations.
So you are saying that when object is moving close to speed of light, time reduce to almost frozen in that object at the eye of observer. Then how can observer seeing that object moving so fast from point A to point B? And if we can see the "clock" on the photon itself, which is moving at speed of light, will we see that it freezes time on itself? So how long do we see it take for the flying object to take to travel A to B?
Since the photon moves at a speed where time stands still, does the photon experience no time, no space?
innerlocus Yes, no matter how far the photon traveled through empty space, from the photon's perspective, it traveled a distance of zero meters in zero seconds.
Eugene Khutoryansky But you can't say that. There simply aren't any reference frames in which a photon could be said to be at rest in. Timelike reference frames do not exist.
Eugene Khutoryansky Woah, that is rather interesting. Would you mind to explain more?
By the way, your videos are AWESOME, thank you a lot.
Markus What he means is that a photon is emitted and absorbed instantly, from its reference frame it doesnt even exist.
Hello,
I have a doubt. What if we look at it another way. Sub atomic particles in particle accelerators travel at more than 99.99% the speed of light. what if we add that to the speed at which earth orbits the sun? Great video again, thanks.
Nev Bruh From Adam's perspective it's only going 10 meters per second. Remember, from his perspective he is standing still and it's the universe that is moving. From Sarah's perspective the ball is barely moving since she see's Adam's time to be nearly frozen.
Nev Bruh That's exactly what is explained in this video. From Adam's point of view (or anything inside the ship) his spaceship is not moving, so the rolling ball would be rolling at a normal speed from anyone's perspective inside the ship.
Anyone else outside the ship would see it rolling extremely slow.
Amer Amodi It's relative. The Sun is moving in relation to Earth from the perspective of those on Earth. From the perspective of the Sun, the particles and those on Earth, time is slowed down so that it the speed of the particles appear less than the 99.99% that we would see on Earth.
Nev Bruh That is relative to where the light originated.
Nev Bruh It would be somewhere between the speed of the spaceship and the speed of light. Much closer to the speed of the spaceship. Look up relative velocity for the equation. You will find that even everyday objects are moving ever so very slightly slower from someone else's perspective than from yours.
What about Adam's perspective of the outside world? When he looks out the window as he walks inside the ship which is traveling near light speed, what does he see?
Shahin Goddousi From Adam's point of view, it is the rest of the Universe that is moving, and he therefore sees everyone else's clocks as going slower. Also, due to Lorentz contraction, he views the rest of the Universe as having contracted in length. This is covered in detail in my main video on Einstein's Theory of Relativity.
Why Adams motion alone is dilated, even the spaceship is also moving at a speed nearer to c, why doesn't the movement of the spaceship appears to be dilated
So, if there's a spaceship going at the speed of light, and I switch on a bulb at the tail end of the spaceship, the light will never reach the front end?
It will. And it will pass it at the speed of light. Thats the thing with relativity, from your point of reference you will never be able to outrun light. But an outside observer like Sarah would see what you described.
So it's impossible to move at the speed of light but it is possible to move slightly slower than the speed of light right
yugioh guy in theory
What if you shine the light inside of the space ship?
Assuming spaceship is moving close to light speed &1 second on spaceship is equal to 10 seconds on Sarah's clock. In 10 seconds spaceship would have travelled 10 light seconds. What speed will Adam calculate? 10 light seconds in 1 second, that would be 10 times speed of light?
Since I wrote on your quantum theory video, that I love your simulated cat, youtube started perpetually showing me cat food advertising. This is so spooky :D:D:D
Completely rhetorical question born out of curiosity.... If Adam is moving near the speed of light, how does Sarah have enough 'time' to determine whether or not Adam even 'exists' within the spaceship, let alone being able to perceive the presence of the spaceship...
I have a question when spaceships goes at exact speed of light Sarah will see Adam is not moving but according to Adam perspective he can't move his leg . he stops thinking as he is travelling with speed of light does this is true
Your videos are amazing! Keep up the good work!
so adam didnt die when he threw the ball outside of his spaceship without spacesuit xD
This thing drive me crazy. how can two events different at the different places.The light coming from the spaceship which make sarah to view adam's activities ,tell her exactly what is happening in the spaceship at same rate. what is going on there? ?
At 2:05 if the ship is moving as fast as light, why is the photon outrunning the ship?? I get thet from sara’s perspective, adam isn’t moving due to time being stopped, and therefore light outruns adam. But it shouldn’t outrun the ship right?
But these "problems" with violating light speed are really a problem with the amount of time it takes the light from Adam's image to reach Sarah. Just because Adam "appears" to be walking slow or standing still does not mean that he actually IS!!! Right?? I know I don't understand like some of you, which is Exactly why I am trying to learn this!! when he throws the ball....the spaceship "appears" to be standing still but it actually is Not...right?? So wouldn't that mean he Could have beaten light speed but it just wouldn't Appear that way to observers due to the additional time it takes for the light of the image to reach Sara or whoever. I mean, if he walks forward he is not Actually gonna be walking super slow or standing still....it just Appears that way. Or No??
"it actually is Not" = in his reference frame, he's not perceiving himself as moving slowly, yes. That's "relativity" : each one its own reference. And also yes, there is the light, carrying the information about Adam walking, that will have some time to travel until Sarah's eye.
Even with a classical mechanic thinking, the slowdown image is evident : during the couple seconds of adam throwing a ball, he'll have travelled roughly earth-moon distance. Sarah is not moving, at mid distance of earth and moon. She suddendly receive a lot of "blue adam" (due to blue shifting of light) coming. Then, being next to him she'll have a normal colored adam, but as static image (like a camera's picture). Then when he move away, she see a red adam (redshift).
During the blue shift, adam will appear to quickly start to launch a ball, and in the redshift he'll appears to very slowly finish to launch the ball.
The vulgarization of physics is tricky because the light does not move instantaneously from adam and sarah to the youtube screen ! I'm not sure, but maybe we can't perceive FTL even if it was happening through electromagnetism.
That's what Sarah would see and record as happening. The same way, if a star 50 light years from earth exploded, when we saw it we would record that the star exploded today. But on "Observer" on another "planet" 25 light years from the star, would have record that the star exploded 25 years ago.
Eugene, how would one go about measuring the speed of his ship and know he's near C? Is it even possible?
I understand that when Adam looks outside that time is slowed and the universe looks contracted. Just as he begins walking at 1kph forward (relative to the ship) while the ship moves at 1kph less than light speed (relative to the outside), does he then see the universe contract from non-zero to zero length? And if he walks at 2kph, what does he see ouside then? Does the universe stretch in the opposite direction? Do outside clocks appear to go in reverse?
Shahin Goddousi Well, he walking 1 kilometer per hour faster relative to the ship will, in Sara's point of view, just add 2 × 10⁻⁹ meters per seconds to his velocity. Thing is, he'll _never_ reach light speed.
What if adam shines a laser forwards instead of walking/throwing ball? Would the laser to adam move forwads at the speed of light? What would Sarah see?
This is explained in detail in the video at ruclips.net/video/ev9zrt__lec/видео.html
What if Sara starts walking backwards? wouldn't she see Adam passing the speed of light?
Time will run backwards. So Adam will move backwards. No way passing the speed of light.
excellent visualization. i have wanted to see this depicted. saves me from using chips of bark to try to imagine.
interesting, so you cant go faster because the faster you go the slower the time passes for you hence you'd be seeing the ball go faster than it "actually" is because for you X seconds would have passed but from the outside it would have been like X.1/10000 of a second?
That means that there could be different parts of the universe "going" at different speeds of time relative to each other no?
just one question. what if we stand still and send one object at the speed of light to the right and another also at that speed to the left? we would see each of them going slow and at 0.9999C but what would they see when they see each other? would it be like when you are on a train and another passes by in the opposite direction looking as if going twice as fast? (2C / its time passing twice as fast as the one standing still's)
Laharl Krichevskoy Yes, time in different part of the Universe can be moving at different speeds. In reply to your other question, if you throw a ball at almost the speed of light towards a space ship that is headed toward you at almost the speed of light, the person in the space ship will still see the ball as moving slower than the speed of light. This is due to the fact that from his perspective, he is the one who is standing still, and it is you who are moving towards him at almost the speed of light. Therefore, he will think that it is time for you which is moving slowly, and that you are therefore moving your arms very slowly when you throw the ball towards him, similarly to how Adam was seen by Sarah as throwing the ball very slowly.
Laharl Krichevskoy There's no absolute time. Only relative. When talking about time dilation, we are simply talking about *ratios*.
U forgot that the horizontal length is also contracted, meaning that one Adam's step is way less than his 'usual'
Well sr was not violated for Sarah or Adam, but it was violated for us at 2:01 when the photon passed a space ship moving at speed of light hahaha! Great video I love your content
Actually, anything with mass (such as a spaceship) can never reach the speed of light, but it can arbitrarily close to the speed of light, and this is what I meant to say. Thanks.
@@EugeneKhutoryansky I know it does sound weird to me as well but the example stated "if the ship travels at the speed of light" (if you go click at 2:01 you will see it actually written and spoken) haha it's a funny mistake indeed, but ofc I'm by no means implying that you did not know this! Just thought it was a little funny moment lol
@@charlesbaoumar6087 In this case actually Adam was supposed to move at the speed (tending to the speed) of light, and the spaceship - slightly slower than Adam's!
@@rdengin you're right! It's because she said "equal" even though it should be "approaching". My apologies for the misunderstanding Mrs Eugene my understanding was still premature but grew thanks to you formidable work! The best physics content on the internet by far!!!!!!!!!!!!!
what if two spaceships would fly at each other at the exact opposite flight directions and each spaceship is moving at the speed of light doesn't it mean that the relative velocity of those ships is 2*C?
Nope! Time dilation prevents that from happening.
I read some pages on a book and some other references regarding time travel, it says that time travel is possible if we can build a time machine that can travel faster than speed of light so my question here is:
Is it true that if you travel faster than speed of light you will be travel back in time? my point here is time travel to the past
+Jet Cannon u need to understand lorentz transformation equation for that. its not that easy or intuitive thing unless you are really passionate about math and physics
Like varun swamy said, you have to understand the Lorentz transformation. But the equation isn't that tough to understand. For any moving object, you multiply its time, its length, and its mass by 1/√(1-v^2/c^2), where v is your velocity and c is the speed of light. As you can see, once your velocity equals c, then you end up dividing by zero, so everything pretty much breaks down there. And if your velocity is *greater* than c, then you end up with an imaginary number in the denominator, which isn't much better. And even if you ignore all that and just say "v greater than c equals negative time! So that must mean traveling into the past!" it still doesn't make much sense. That's also the factor by which your length contracts, so do you start to stretch out when you go faster than c? Or do you just gain negative length? What does that mean? And negative mass too? Not a very promising time machine.
Awesome Eugene!! Thank you so much for another great, fun video to watch!
Diogo Canina Thanks. I am glad you liked it.
Eugene Khutoryansky Yes I do like all of them, however, the Electromagnetism video is by far my favorite yet. Good job!!
Someone could please give me the name of the background song?
Dante Villalobos It is from the free RUclips audio library, and it is titled
"From_Russia_with_Love"
Thanks.
Eugene Khutoryansky Thank you very much, by the way I love your videos, they are so well explained. Keep up the good work:)
I feel like the point is that if you do go faster than the speed of light, you cant prove it to anyone so dont bother telling them lol
what if you had two quantum entangled particles one on the spaceship and
one on the earth and he fires a particle forward effecting the spin of the
entangled particle which instantly effecting the other particle so in
his time frame he send a particle at the speed of light forward and
Sarah recorded the time when the quantum spin state changed and then
could add both his speed plus the speed of light together doubling it
does this work?
Remember, different observers will disagree about whether or not two events happened simultaneously.
Guys I have a question. Suppose Adam and Sarah are both sitting in spaceships, and they both start to move very close to the speed of light, in opposite directions. Now to us, the third viewer, both of them individually are moving close to the speed of light (Let's call this speed c`). But let's say there is nothing else in the universe other than sarah and adam and their spaceships. Now, Adam is right to believe that his spaceship is standing still, but when he sees Sarah's spaceship, he sees her spaceship go 2c`, which is much higher than the speed of light, hence, violating Einstien's theory of relativity. Any thoughts?
+saksham chauhan That's an interesting question. I'm figuring that in this scenario, for both, Adam and Sarah, the length of the universe would contract to nearly zero - and since speed is measured as travelled distance in time, they would actually measure a speed close to zero. In the extreme scenario, if you replace them by light particles, from the perspective of the light particles, they would stay at the same place and wouldn't be moving at all (since the whole universe would be of size zero and the definition of space actually ceases to exist) And now my mind is twisted - I should probably go to bed ;-)
haha nice views, and good night :)
+saksham chauhan But its the same for sarah. If there is nothing else but her, adam and their spaceships both. They are both moving at speed c` from one another not 2c`
From a third observer they see both ships travel at the same speed (almost 0). So Adam's ship speed = c` = Sarah's ship speed.
From Adams point of view, his ship has been standing still for this whole duration and therefore sarahs ship hasnt moved at double speeds. she has been moving at exactly c` like she always have.
+klaik30 that doesn't make any useful sense. i don't think you understood his hypothetical scenario.
+saksham chauhan it makes me think that nothing with mass can go 1/2 of c wrt anything else with mass in the vicinity for that reason. meanwhile the distant galaxies are alleged to go faster than light from our perspective though we can't actually see them so they practically aren't breaking the rule because no one really can catch them. "what you don't know can't hurt you." "you'll have to catch me first."
If the spaceship is travelling at the speed of light, Adam will not move for Sarah, so he can't go faster than light. Ok, but the spaceship is already flying at the speed of light. Isn't it violating the relativity? it was just a fictional situation, because It's not possible to travel at the speed of light, right?
Rodrigo Appendino That is correct, it is not possible to travel at the speed of light, but you can approach arbitrarily close to the speed of light.
Rodrigo Appendino Well, problem is, he can't. It's simply nonsensical to say that something "travels at the speed of light," unless it's a massless particle.
I know, markus
Spaceship moving at the speed of light. Photon #stillwinning
Great vid as always! :)
A glass plate's thickness dictates the amount of reflected light. Some light scatters from the upper surface, some from the lower surface. According to QED, the upper surface reflection is affected by the distance to the lower surface. Since the upper surface appears to instantaneously know the distance to the lower surface, here is my attempt:
A veeery thick glass plate with a variable thickness mechanism is placed between two planets. Light is shone on the upper surface and the amount of reflection is detected there. Could another person with the variable thickness control, on the other side of the glass plate, send instant morse signals in reflectivity?
No, but you're trying to invent something that would, quantum entangled networking aims to do something magic like it
time = motion. no motion = you stopped the time. you replay the motion in reverse manner = you reversed time. and the same for fast forwarding time. living organisms are hard to predict because their motion depends on brain decisions and not solely by the law of physics to get to a certain point.
If we want to go "faster" than light, we stay still and expand and contract the SPACE around the ship because space can do what ever it wants. That is how the warp engines in Star Trek work. Expand space behind, contract space in front. And that's how to get to Alpha Centauri, 4.37 light years away, in a matter of weeks.
+Cameron Hawkins Using the warp drive also wouldn't lead to any time dilation so you could return to Earth without everyone you know aging dramatically.
Adam's ship is getting better and better :)
***** This video needed a bigger spaceship, so that Adam could walk inside it.
***** But i like the coloured clock.
Fantastic info Eugene, it makes for very easy understanding :)
+bonetiger8, glad you liked it. Thanks.
i dont understand why we cant travel at the speed of light>??? Eugne Any helpSir?
Time slows the closer you approach the speed of light according to mass. (the more mass the slower) Light has no mass (or almost), which is why the higgs boson particle can exeed the speed of light. (it has no mass)
+Apoorva Gupta in earth many things travels at speed of light
+Apoorva Gupta watch lecture series by prof. shiva prasad from iit bombay on special theory of relativity. trust me, if u give some time to it, u will def understand it from this lecture series. all confusing things are explained quite intuitively and comprehensively
can someone answer me please :one of the rules : that the speed of light is equale for all observors... but in the video here adam is at very fast speed and he sees the light as its moving sloweky not on the speed of light !! so for adams point of view the light is moving with a little speed which disagree the rule !can someone explaine please
Adam still sees the ball of light moving at the regular speed of light. This is because to measure this speed, he needs to use his clock inside the spaceship, and from the perspective of everyone outside this spaceship, his clock is running very slowly.
@@EugeneKhutoryansky
i still didnt get it sorry...i think i need to understand the nature of light first before getting to understand this
but anyway thanks for the quick respond i appreciate it
what if adam shines a torch???
If Adam did go faster than the speed of light, would Sarah see Adam move in reverse/rewind?
Sarah wouldnt see Adam at all since no photons would be able to scatter off his spaceship and go into Sarah's eyeballs.
Fantastic! thank you..
Ahmed Zezo Thanks. I am glad you liked it.
Thanks for reply
In your video u says that adam is in spaceship and he throughs the ball forward(or walk forward). In my queastin adam is in space ship but sara through tha ball backward(or walk backward).
According the theory, sara feels that adam's time is moving slow so adam feels that sara's time is moving fast. And if sara through the ball backward(or walk bacward),
Due to fast moving time, ball is going fast. So according to adam's view sara is moving backward nearly the speed of light and through the ball backward so ball is going faster than light.
ashish nigam No, Adam does not view Sarah's time as moving fast. Adam sees Sarah's time as moving slowly. Both Adam and Sarah view the other person's clock as moving slower than their own. If this were not the case, then it would be possible to tell who is moving, which would violate the founding principle of Einstein's Theory of Relativity.
Eugene Khutoryansky thanks now i can understand
Eugene Khutoryansky then according to photon perspective i m going with the speed of light and my clock's tick stop.
And if sara and adam both feel that other person's time slower than thair own so both feel that they r older than other. Then who is in future relative to other.
And if i wish go into future so if i will go with speed nearly to light then i will see that others person's clock slower than me so they will going in future not i.
And according to others i m in future.
Totly contradictid.
Is there r any proof of ttheory of relativity???????
Eugene Khutoryansky and who is going into future relative to others??
Sara or adam
ashish nigam I cover that question in detail in my "Twin Paradox" video. You can find it in the links at the end of the video up above, or from my RUclips home page. Thanks.
Wonderful.
Danny Criss Thanks for the compliment. I am glad you liked it.
Thanks for the video!
Thanks.
2:00 When spaceship moves at the speed of light Sarah won't see Adam always moving slower, than the speed of light. She will see him moving at the speed of light.
Objects with mass can never travel at exactly the speed of light, but they can get arbitrarily close to the speed of light, and that is what I was referring to.
@@EugeneKhutoryansky I am aware of this fact, thanks! In general I really appreciate your efforts to explain complex things in a simple way! Thanks!
That's only prospective tho Adam is still walking??? It's impossible to say that going faster then the speed of light isn't possible
If sara through the ball in opposite direction of adam. Since sara's time faster than adam. And according to adam's perspectiive he is still and sara is moving nearly the speed of light and she throughs a ball and her time faster than adam then it looks like ball is going faster than light (according to adam's perspective).
And according the logic of twin paradox sara's time never slower than adam's
And if u say from adam's perspective that sara's time go slower then adam's then it is again creat twin paradox.
And sorry for my english
Waiting for your answer
ashish nigam I am not sure if I understood your question properly. From Adam's perspective, he is standing still. Therefore, no matter what direction he throws the ball, he will always think that the ball is moving much slower than the speed of light. If this doesn't answer the question you were trying to ask, please let me know.
Adam's clock is slowing down because the photon is having a longer distance to travel to reach the detector. Firing photons from both directions towards the middle and comparing the differences in frequencies will fix the problem.
That is actually a different phenomenon. I discuss that in my video at ruclips.net/video/ruRrVWHcgws/видео.html
@@EugeneKhutoryansky its the same phenomenon. You are still making the same mistake.
The photon from the center ship will reach the trailing ship first as that ship is moving to meet it.
This is not a mistake. What you wrote is exactly what I showed in that other video.
@@EugeneKhutoryansky you showed the photon reaching the front and back ship at the same time. That doesn't happen when the ships are in motion.
It depends on who's point of view you are talking about. From the perspective of a person inside one of the spaceships, the spaceships are at rest.
Great video
Glad you liked it. Thanks.
I have a real clever idea to violate the principle. Adam just has to slow down his clock even more. For exampl,e if he lets his clock run at half speed then his clock will slow down twice as much as he does meaning that time will slow twice as much as he does meaning that his decrease in speed will be only half as much. If he makes his clock run 100 times slower than Adam will only slow down by 1/100th of the normal slow down. This might allow him to walk faster than the speed of light.
Unfortunately, the speed at which his clock ticks is directly related to his velocity. Adam cannot alter the rate of time on his clock without changing the speed of the spaceship
Wish my space ship was as badass as adams...
My mind can't seem to grasp that concept, or anything of relativity for that matter, can you explain differently?
2:01 "If the ship's speed EQUALS the speed of light, Sarah will see time inside the spaceship stop completely, and she will see Adam's walking speed decrease to zero.
Therefore, Sarah will always see Adam moving SLOWER than the speed of light."
So the ship EQUALS the speed of time. Even if Adam keeps sitting or standing, Sarah will see Adam moving together with the spaceship AT the speed of light.
Isn't it? If not please explain why.
And BTW, you forgot to mention that if the ship's speed EQUALS the speed of light, it will have to stand against all the (extreme blue shifted -> gamma) radiation of the whole universe at once, since the distance shrinked to zero. IMO this is the challenge we will never ever be mastering, even if we are able to reach 99,9% of the speed of light.
The speed of the spaceship can never actually reach the speed of light, due to the fact that the spaceship has mass. But the spaceship can approach arbitrarily close to the speed of light, and that is really the scenario I was referring to.
i understand. and hey THANKS for being there for us viewers and answering our questions! i do appreciate that much.
there is something called tachyons that travel faster than light. 0 energy means infinite speed and infinite energy 0 speed.
+bontha venkata jayanth, it is presently believed that tachyons don't actually exist. Details are available in the Wikipedia article on tachyons.
Hi adam cant walk when he reaches speed of light because he would turn into energy...
we are already energy
Eugene Khutoryansky What if Adam has an imaginary number speed?
Sarah should go to specsavers
If Adam decides to throw a ball out of his spaceship, then... HE WILL DIE OF VIOLENT DECOMPRESSION before he even release the ball !!!! :(
I thought this is suppose to be teaching us proper physics !!
Jokes, I love the video, you have done a great job, please keep it up. :D
But the non-sense is something you might want to avoid...
1 what if the speed of light =photon never heard about Albert and ignores his idea about.
2 what if Sarah shins like the sun and Adam is watching at her with a mirror in front of him.
3 what if Adam decides to continue accelerating? can Adam still see the photon from Sarahs face?
4 is it possible that Sarah still sees Adam and Adam cannot see her simply because he travels relatively to
Sarah faster than C.
5 is it true that C is the limit?
Time is constant! How the time stops
Age is constant.
Make me really confuse
That's it. I'm spoiled lol.
Antoine OBannon Not to worry. Lots more videos are coming soon.
it is impossible to observe something moving faster than light.. The reason is very obvious
lol
but speed of light + 0 = speed of light
The time dilation needed to make this explanation work only happens if it's assumed that the speed of light is an upper limit. We have to assume what it is that we are trying to prove.
Your animation IK constraint is WAY WAY WAY too high!
What if the speed of spaceship is greater than speed of light??
There's a small inconsistency at 2:07, I think. If the spaceship is moving at the speed of light (assuming that's possible), then the photon should not be moving forward in the animation (ie. moving faster than the spaceship).
The spaceship is not moving at the speed of light, because objects with mass can never reach the speed of light. But, they can get arbitrarily close to the speed of light, and that is what I was trying to show. Thanks.
@@EugeneKhutoryansky You're right of course, and it's clear to me that that's the point you were making. It's just that the video explicitly explores the scenario where the spaceship travels at the speed of light (surely because it was necessary to show that you can't (theoretically) make a step forward at all at the speed of light to break it). Assuming that this was possible however, the photon should be moving at the same speed as the ship.
Also, let me take this opportunity to say that I've been watching your amazing videos throughout the years and they really helped me better understand physics! I really appreciate your work, thank you so much! 😊
Thanks for the compliments. I am glad my videos have been helpful.
thats from their perspective but it really did go faster than light -_-
+Venum Nope. Adams perspective is an illusion based on the fact that time is slowed down for him. What sarah sees is the true perspective, adam is moving slower the closer he gets to lightspeed because time is slowed down, and the slowdown is always just enough so that you cannot surpass lightspeed.
+David Burke, Adam's perspective is just as valid as is Sarah's perspective. But, from Adam's perspective, his ship was standing still the entire time. Therefore, from his perspective, neither he nor his ball ever even got close to the speed of light.
If you are going speed of light you need only to turn on your light on phone and you break speed of light by duble it... 😂😂
Did you even watch the video
+SpeedyHD Nope. Light always moves at exactly the same speed for all observers. In Einstein's relativity, speeds don't just add like they do in Newton's mechanics.
I just don't "buy" that "Time stops at the speed of light" bullshit. Nothing can stop the flow of time.
stephen lang
It's hard to imagine, isn't it. It's something so far beyond our experience if probably why. But there is a lot of modern technology that relies on this principle.
GPS, for example, relies on atomic clocks on board satellites that give very precise measurements of when the signal from your phone or devise arrives. If they didn't compensate for time dilation, the reading you'd get for your position would drift several miles each day.
lewiszim
Yeah but time coming to a complete standstill is still not possible. I remember an episode of the Twilight Zone where they had a stopwatch that stops time.The Man that got it used it to play practical jokes on People. And then there was an episode of the Simpsons where Bart Simpson used the same type of stopwatch to play practical jokes on His Dad. But that's just fantasy.
This is scary, it's like universe is trying to stop you from passing the speed of light
Angry grandpa music
Eugene, your gravity videos have been great. This video is good too. However, your video where you explain how time dilation is what is felt as gravity isn't as good lol. You represent 2 spatial dimensions and 1 time dimension in that video and you say that the time dilation is what causes the object to start moving toward the earth. This is difficult to understand. It's not as clearly explained as your other vids on gravity and this vid on the speed of light. I think you should try to re-explain it in an easier way to understand. Good luck.
Having said that, I like a lot of your videos I think you simulate things very well. If Einstein were around, I would say he would be pleased with your gedanken presentations :)
❤
#Sacrament
#ThePathsJesusWalked
2Nephi31:20
20 wherefore ye must press forward with a steadfastness in Christ having a perfect brightness of hope and a Love of God and of all men WHEREFORE If he shall press forward feasting upon the word of Christ and Endure to the end behold thus dairy the father He shall have eternal Life
3Nephi27:20
20 Now this is the commandment #Repent all ye ends of the earth and come unto me and be #baptized in my name that ye may be #sanctified by the reception of the Holy Ghost that ye may stand #spotless before me at the last day.
Moro4:3
3 O God the Eternal Father we ask thee in the name of thy Son Jesus Christ to bless and sanctify this #bread to the souls of all those who partake of it that they may eat in #remembrance of the body of thy Son and witness unto thee O God the Eternal Father that they are willing to take upon them the #Name of thy Son and always remember him and keep his commandments which he hath given them that they may always have his #Spirit to be with them Amen.
Moroni5:2
2 O God the Eternal Father we ask thee in the name of thy Son Jesus Christ to bless and sanctify this #wine to the souls of all those who drink of it that they may do it in remembrance of the #BloodOfThySon which was shed for them that they may witness unto theeO God the Eternal Father that they do always remember him that they may have his Spirit to be with them Amen.
Moroni10:33.
33 And again if ye by the grace of God are perfect in Christ and deny not his power then are ye #SanctifiedInChristByTheGraceOfGod through the shedding of the #BloodOfChrist which is in the covenant of the Father unto the remission of your sins that ye become #HolyWithoutSpot
39 Now this change was not equal to that which shall take place at the last day but there was a change wrought upon them insomuch that Satan could have no power over them that he could not tempt them and they were #SanctifiedInTheFlesh that they were #holy and that the powers of the earth could not hold them.
2Ne2:10
10 And because of the intercession for #all, all men come unto God; wherefore, they stand in the presence of him, to be #judged of him according to the truth and #holiness which is in him. Wherefore, the ends of the law which the Holy One hath given, unto the inflicting of the #punishment which is affixed, which punishment that is affixed is in opposition to that of the happiness which is affixed, to answer the ends of the #atonement
2Ne31:20
20 ดังนั้นท่านต้องมุ่งหน้าด้วยความแน่วแน่ในพระคริสต์โดยมีความเจิดจ้าบริบูรณ์แห่งความหวังและความรักต่อพระผู้เป็นเจ้าและต่อมนุษย์ทั้งปวงดังนั้นหากท่านจะมุ่งหน้าดื่มด่ำพระวจนะของพระคริสต์และอดทนจนกว่าชีวิตจะหาไม่ ดูเถอะพระบิดาตรัสดังนี้เจ้าจะมีชีวิตนิรันดร์
3Ne27:20
๒๐ บัดนี้นี่คือบัญญัติจงกลับใจเจ้าทั้งหลายทั่วสุดแดนแผ่นดินโลกและมาหาเราและรับบัพติศมาในนามของเราและเจ้าจะได้รับการชำระให้บริสุทธิ์โดยการรับพระวิญญาณบริสุทธิ์เพื่อเจ้าจะยืนอยู่โดยไม่มีมลทินต่อหน้าเราในวันสุดท้าย
Moro4:3
๓ ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์พวกข้าพระองค์ทูลขอพระองค์ในพระนามของพระบุตรของพระองค์พระเยซูคริสต์โปรดประทานพรและทำให้ขนมปังนี้ศักดิ์สิทธิ์แก่จิตวิญญาณของเขาทั้งหลายผู้ที่รับส่วนเพื่อพวกเขาจะรับประทานในความระลึกถึงพระวรกายของพระบุตรของพระองค์และเป็นพยานต่อพระองค์ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์ว่าพวกเขาเต็มใจรับพระนามของพระบุตรของพระองค์และระลึกถึงพระองค์ตลอดเวลาและรักษาพระบัญญัติของพระองค์ซึ่งพระองค์ประทานให้พวกเขาเพื่อพวกเขาจะมีพระวิญญาณของพระองค์อยู่กับพวกเขาตลอดเวลาเอเมน
Moro5:2
๒ ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์พวกข้าพระองค์ทูลขอพระองค์ในพระนามของพระบุตรของพระองค์พระเยซูคริสต์โปรดประทานพรและทำให้เหล้าองุ่นนี้ศักดิ์สิทธิ์แก่จิตวิญญาณของเขาทั้งหลายผู้ที่ดื่มเพื่อพวกเขาจะทำในความระลึกถึงพระโลหิตของพระบุตรของพระองค์ซึ่งหลั่งเพื่อพวกเขาเพื่อพวกเขาจะเป็นพยานต่อพระองค์ข้าแต่พระผู้เป็นเจ้าพระบิดานิรันดร์ว่าพวกเขาระลึกถึงพระองค์ตลอดเวลาเพื่อพวกเขาจะมีพระวิญญาณของพระองค์อยู่กับพวกเขาเอเมน
Moroni10:33
๓๓ และอนึ่งหากท่านโดยพระคุณของพระผู้เป็นเจ้าดีพร้อมในพระคริสต์และไม่ปฏิเสธเดชานุภาพของพระองค์เมื่อนั้นท่านย่อมได้รับการชำระให้บริสุทธิ์ในพระคริสต์โดยพระคุณของพระผู้เป็นเจ้าผ่านการหลั่งพระโลหิตของพระคริสต์ซึ่งมีอยู่ในพันธสัญญาของพระบิดาอันนำไปสู่การปลดบาปของท่านทำให้ท่านกลับบริสุทธิ์ปราศจากมลทิน
2Ne28:39
๓๙ แล้วการเปลี่ยนแปลงนี้ไม่อาจเทียบได้กับการเปลี่ยนแปลงที่จะเกิดขึ้นในวันสุดท้าย แต่เกิดการเปลี่ยนแปลงกับพวกท่านถึงขนาดที่ซาตานจะมีอำนาจเหนือพวกท่านไม่ได้คือเขาจะล่อลวงพวกท่านไม่ได้และพวกท่านได้รับการชำระให้บริสุทธิ์แล้วในเนื้อหนังจนพวกท่านบริสุทธิ์และจนพลังของแผ่นดินโลกจะยึดพวกท่านไว้ไม่ได้
2Ne2:10
๑๐ และเพราะการวิงวอนแทนคนทั้งปวงมนุษย์ทั้งปวงมาสู่พระผู้เป็นเจ้าดังนั้นพวกเขายืนอยู่ในที่ประทับของพระองค์เพื่อรับการพิพากษาของพระองค์ตามความจริงและความบริสุทธิ์ที่มีอยู่ในพระองค์ดังนั้นเจตนารมณ์ของกฎซึ่งพระผู้บริสุทธิ์ประทานให้เพื่อทำให้เกิดการลงโทษซึ่งมาพร้อมกฎซึ่งการลงโทษที่มาพร้อมกฎนั้นเป็นการตรงกันข้ามกับสิ่งที่เป็นความสุขซึ่งมาพร้อมกฎเพื่อสนองตอบเจตนารมณ์ของการชดใช้
#PrayAlways in the name of Jesus Christ amen
#LoveTheEssenceOfTheGospel
Nu15 kku22
Papada Oonmueangpia
Bunthariga Oonmueangpia
Lumpoon Tanapoomchai
Wrd June14,2023,8:53 PM
keeping adam and sarah perpectives aside, in reality the ball speed surpassed the speed of light!!
I don't understand this and it makes me angry
Walking in the speed of light you'll desintdegrate whoops wrong spelling
I never thought about the theory of relativity this way! Outstanding clarification as always. 😁
Thanks.