There's a game called "A Slower Speed of Light" that simulates relativistic doppler shift, lorentz aberration, and length contraction. The speed of light is set to a brisk jog, allowing the player to explore a human-scale environment at light speed. It's a bit of a trip, but it might help to build an intuitive understanding of relativistic effects. Or, sign up for Brilliant :)
And there is a nice video in YT explaining what you see in the game, and why, You Won't Believe How Weird Approaching The Speed Of Light Can Get | Doppler Effect & Time Dilation also this A Slower Speed of Light - MIT Game Lab Relativity Engine
Just downloaded and played it. Finished in 7:01 which is very slow I think. I wanted to like it but honestly I think it is just going to look like glitches to most gamers.
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades... ... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos ! Arvin has become one of the greatest popular science educators in my lifetime !
@@ArvinAsh Okay. If we are already hurdling through space at (what speed?) doesn't that bring us closer to attaining speed of light if we make up that difference? Instead of from a dead zero speed say from the center of the universe (calculate dead 0 speed)..I'm not messing with ya. sorry if it sounds that way.
@@healthy2202 A bit late, but just reading it now 😁 You have to remember that speed is relative. There is no absolute stand-still. So you have to think about: speed compared to what?
The fact that we can calculate how it would look when travelling closer to speed of light and use that info to create exact images using CGI is so cool and exciting. Great video. The amount of effort gone into making this video is appreciated.
While I don't disagree with you, I want to point out that we really don't know what it would look like. This could be very accurate (and most likely is) but it could also be very wrong its only speculation at this point. Very cool none the less. I am just one of those party pooping types I guess lol
@@78kasper78 Yeah, this is true. Relativity, while correct for most situations we can observe, completely breaks down in extreme conditions like at the event horizon of a black hole. This doesn't mean relativity is wrong, it just means it's incomplete and cannot describe that situation. For everyday situations with no high speeds or large masses involved, relativity will actually reduce to Newton's laws (by just making certain assumptions). Relativity will eventually be superceded by something else like M-Theory (which will reduce to relativity given certain assumptions). Relativity still makes my brain hurt though.
There is a fantastic game the MIT lab made and released open source called A Slower Speed of Light. Because you really can't model what looking that fast would be like reasonably, it instead slows light down to show both the color shift as well as the 'latency' and looking forward but in the past. Moving faster than all blue light is a very strange idea. Realizing the issue isn't going that fast but rather hitting slower things at that speed (tachyons) can reframe why moving so fast can be bad no matter what way you look at it, but I think messing around with the game can put the general theory into. The demonstrated doppler effect with colors is incredibly beautiful. One could imagine how it might be perceived if our eyes had more concepts for a wider range of radiations.
@@ArvinAsh Oh oopsie hehe I just thought of it immediately My brain starts to go mush as soon as I consider two different reference frames thanks for the video :D
Saw video on similar topic on very popular channel but barely understand anything. Your explanation is very simple, even a kid can understand. Keep going!
Arvin, I commend your elucidation in this video. I haven't watched any video as clear as you did explain. You answered my curiosity on how I would see the surrounding while traveling at light speed. Thanks a lot. You are awesome and gifted.
Arvin, so are you telling me that taking one hit of LSD is equivalent to traveling near the speed of light? 9:52 Ahahah, just kidding! Love your channel!
Another lesson her should be hanging a warning sign on the front window like they do for rearview mirrors, "warning stars are closer to you than they appear when you're near light speed"
You're so brillant Arvin respect! Each video is an amazing adventure, simply your ton of voice make us feel like you're saying obvious and easy things in spite of you're talking about complex stuff... That's the real talent, your talent, you're brillant. Thank you so much i can't get enough of your videos Arvin! Happy new year and lot of success, all you deserve
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades... ... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos ! Arvin has become one of the greatest popular science educators in my lifetime !
@@ArvinAsh Yes , I agree with that . "Everything is relative". It is somehow disturbing . It creates a strange kind of fear in the human mind. But great video as always. 👍
"Everything is relative", I said to my teacher in history of science. He (who was also a phycisist) corrected me: "Everything is relative -- except the speed of light!" And of course he was right, C is a universal constant. But now I wonder: Would there be any relativistic effects at all, if even the speed of light was relative? And if _nothing_ was relative, how should that universe looks like?
The frame at 3:50 Just Blew My mind After many Years I finally understood what's redshifting of light Thanks Man You Really Explained A Complex Question Simply with A Picture
Issac arthur also explained like this video has by saying it the speed at which information can travel but we call it speed of light. Love how u make this topic easy for anyone to understand.
Another question about light and expansion of space. When we see deep space, we are seeing the "distant past", the stuff that happened in our light cone. So when we "measure the expansion of space" and see acceleration, does it not mean that we are confirming that earlier inflationary period? I mean visually, we are not seeing that space is now expanding in all directions, we are seeing that it was expanding in the past. Anything happening "now" at a great distance away is not in our light cone, so there is no equivalent of the Hubble constant for present states of the distant universe. Those events are not in our light cone...???
@@Birrrrra so maybe the future is a non-trivial solution to the zeta function. We can only see what will happen next by analytic continuation of the past coming into contact with the bowshock of the unseen deterministic equations of relativity (lorentz transform). Ie, just because physics is deterministic does not mean it is predictable or uh unsurprising. Scary lol
@@Birrrrra haha well everyone is lost at the zeta function actually! The existence of any those solutions was predicted by Riemann to lie on the line x=1/2. If you can disprove that (by knowing all solutions somehow and one of them not being on the line) then you will win one million dollars. Yeah baby yeah (I mean if I understand the rules heh) anyways the function makes some cool pictures and there is a lot of content online about this famous problem if you are interested
Brilliantly explained. I'm also pleased to have confirmation that I got things pretty much right in a short story I wrote about someone travelling at almost light speed :)
@@PetraKann The word is applicable in the story context. Basically they are trapped in a ship that has power and is accelerating indefinitely (for billions of years, at least) but perceiving time at a very rapid rate. Hard to explain it all here but it involves uploading a mind into a machine...
@@macronencer Interesting. I like Sci-Fi. I have been working on a Sci-Fi story - more along the lines of a novel though. It's a little cryptic as far as the plot and main themes are concerned so there is a lot of input and interpretation needed from the reader. Not much is given away in the story apart from character interactions. In fact it's not clear where and when on the time-line the narrative is set. Transferring a mind into a mechanistic framework is problematic. Some time ago I read a book on the Physics of Large numbers and the author revealed the largest number that he knew of which could be directly coupled to something physical in the Universe. He mentioned numbers such as the total number of atoms in the observable Universe which is maybe around 10^80. He moved higher and higher until he got to the largest physical number and that was the number of different neural combinations in the Human Brain. The estimate is based upon a cluster of neurons of specific size (10 or 100 from memory). The estimate for the total number of different neural connection combinations was 10^700,000,000,000,000 (ie 10 raised to the 700 tirllion). So unless you truncate or drastically reduce the capacity and power of the Human Brain, it would not be able to be uploaded into a device that is mechanistic and non-biological in nature. There simply arent enough atoms in the Universe to make such a device. What was the nature of the computer in your story? A quantum computer?
I’m just a regular guy that loves sci-fi movies and novels. However, your content has quickly become part of my regular “entertainment” diet. Almost every video you make causes me to gasp or audibly exclaim ,”holy cow!” You help me understand the wonders of scientific discovery and the amazing nature of our universe. Thanks for what you do! I will continue to share, subscribe and support your channel!
@@UnchartedWorlds this video was amazing fyi, I already knew about time dilation and light shifting, but the length contraction thing. That must have gone over my head all these years... I'm still processing it... so not only are you getting somewhere faster, but the distance getting there is less. but time dilation kicks in if object has mass and really throws me off now... I'm gonna have to watch the equations part of this video a few times and really process that. because from what I know of time dilation, travelling close to the speed of light send you to the future, even though from your perspective as the traveler you are getting there quicker and shorter now with length contraction. That's wacky... like I said, I gotta think about this for a bit...the length contraction thing is really mind blowing... And it's not a perspective thing... the length is actually different?! also thinking about how we should have mini telescopes in orbit around the sun going at fractions of c so we can view different spectrums of light...
@@ArvinAsh when you described the Doppler effect of light, seeing things behind you in the front window, I thought of the Analogy of driving in the rain. The faster you go, the more the rain appears to be going sideways, directly into the windshield. Even if it’s actually blowing in the opposite direction. If the rain were blowing sideways at 60mph, like in a hurricane, and you are driving in that same direction, the rain will appear to be falling straight down as you drive 60mph, and appear to be coming at you as you go even faster. Just like the photons leaving an object behind you, you are running into those photons that left the object at a previous time, those photons are moving away from the object behind you, but you are catching up to them as they hit the windshield (front window?) of your spaceship. Love it! This was an exceptional video!
I wish this guy was on the table when writing screenplays for sci fi flicks. Producers and directors need him on the set. I would say maybe take some acting classes but by what I see and hear here he would nail it on the first take to get audience up to speed. but he would have to sell faster than the speed of light to sell the script. I don't think he can because that would be bending the rules. Maybe that is why 99.9% of us go faster than the speed limit. I love this guy. I admit I had to watch it a few times to catch most of it. I'll do it again to keep up to speed. lol.
I would love to see a demo of these visual effects of traveling near light speed in virtual reality. Seems like a perfect medium for showing something like this to envision what it would actually “feel” like given VR’s immersive qualities.
Fun fact. It's true, but seems odd, that if you were going the speed of sound, or say a little faster at Mach 1.1, and something ahead of you was dangerous, (a dog in the road) if you honked the horn, sound would not reach the spot until after you passed. (hypothetical scenario, of course.)
I made a comment on the pre-release video. 1 safety issue overlooked is that normal visible light can also become dangerous ionising radiation by turning into UV-C, X-Ray, Gamma Ray by the doppler effect if the spacecraft is traveling fast enough towards a light source.
I am so worried now 🤔travelling at light speed doesn't sound fun anymore and we might jump the traffic signal too. Avoiding collision is another worry.
Thank you Mister Ash. Happy New Year. I always wait eagerly for your new videos as all those are so fantastic and so educational and easily accessible for amateurs who do not work in the field of astronomy or physics. Thank you for your great videos !!
Speaking of length contraction: It would be possible to travel to the center of our galaxy and back within about 40 years. However, 52,000 years would have passed on Earth and no one would know who the astronauts were. If by then there should still be a humanity.
You make some willlld cool videos, especially for a layman like me!!! Thank you so much!!! I’m an anthro/history/behavioral studies student and here I am feeling like I’m in a Dr. Who episode!!! Love your videos Arvin!!!! It’s wonderful how you break it down so even I can wrap my mind around it!
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades... ... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos ! Arvin has become one of the greatest popular science educators in my lifetime !
Which is the best University for history/ anthropology/ languages in the US ? Or the best 3-4 ones. My 15 year old son is deeply interested in history and he is really good at it. Knows more than his teachers , usually.
I love Arvin's explanation, Thank You Arvin that even dullards like me can understand complex concepts. Edit : btw is it me or anyone else noticed u kinda change your intro music ?
I’ve been thinking about this exact question for years asking people about it and only getting partial answers and sometimes no answers and little explanation. But now I got it. Sort of! Great job explaining this. I have one more part, I would like to “feel”. Not great with the math. If we did the identical same experiment, but now say moving away from earth but having a super great telescope constantly focused on earth, what would it look like moving away from earth? Ok, folks on earth from our perspective would appear to be moving slower and slower as we approached the speed of light. As we then slow down, I would assume folks on earth and the planets rotation around the sun would appear to move at the same speed as objects not in motion relative to each other and as we turn around and point the space ship facing earth and begin to accelerate, I think earth would appear to revolve around the sun faster and faster. As we slowed down to land back in earth again rotation of earth around the sun would appear to be back to normal as we got close to land on earth. But, I also know that for earthlings maybe 50 years went by and for me, maybe only 1 year went by. I’d love to see an animation of that with clocks on earth and spaceship and a “differential” to see how it all works and “feels”. These animation can teach the world the beauty of our universe and this video you did today blows my mind. Its great. Just a small request, if you too find it interesting to tackle the proposition proposed with the telescope constantly at earth and time differences I’d bet of folks would love that. It would be fun to zoom around the universe in a game that had all effects built in including clocks on earth and spaceship and views out the front, side and rear windows. Anyways, I am much closer to at least understanding this than I was before your video. Thank you very much. Stefan
Arvin, another great video, explaining a mind bending question. I enjoyed it very much. You have not lost your touch. As usual, the graphics are right up there, helping us more clearly understand your proposal. Thank you.
Hi Captain Peter 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
But speed of light is not an attribute of some object (photon) it is measurment conclusion which is same for all observers exactly because everything is relative and conclusions are subjective :)
Awesome video Arvin, as usual! 👏👏👏👏 8:45, how could you get more photons in the direction of motion and less opposite to the direction of motion? Einstein's SR states that the speed of light remains constant so basically if one would travel at speed of light, a photons leaving our spaceship will still travel at speed of light and on the opposite, a photons travellng towards the spaceship will also travel at the speed of light 🤔
Good question! Light intensity is determined, not by the speed, but by the number of photons hitting your eyes. As you race forward, the number of photons entering your eyes is higher because you are racing towards them. The opposite happens behind you as you race away from them.
@@ArvinAsh I got the intensity of light coming from the number of photons entering the eyes. But to me, it remains the same amont whether we race forward vs racing opposite to them since they are still travelling at speed of light relative to us and thus the amount of photons should remain the same hence no difference of light intensity in my humble opinion but I m not astrophysicist 😁 However, the explanation could be that because you start to perceive objects at 90° or even behind you in your field of view, the amount of photons is way higher in front of you than behind you and thus a higher light intensity looking forward than backward. Does it make sense? I really appreciate the time you took to answer, I was not even expecting you to answer given the amount of comments you re havng on your channel! Congrats again for your videos, I really love them. Greetings from Belgium.
Hey buddy i think you miss something important in QM I=nE/At in other words the intensity of light equal to many photons multiplied by photon energy(Joule)divided by surface area( M^2) multiplied by time(Second) meaning that the I inversely proportional to time since I=n implied that that if you moving at light direction the total of light hitting to your all body would be higher than the oppposite since your distance towards the light is closer compare to opposite direction
When I saw the topic yesterday, I mainly thought in terms of time dilation. Your talk has opened up a whole new possibility on the basis of Doppler effect. I suppose one needs a fertile imagination too for understanding relativity.
Hi Gururaj 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
Excellent video. I’ve always wondered this. The next question is what would things look like on a ship like the Enterprise traveling faster than light?
Well, presumably they would be in a warp bubble, so inside their bubble they would not experience any time dilation or length contraction effects because they would not be moving relative to the space inside the bubble. Regarding what they would see "outside" this bubble, I am not sure. They may not see anything because the space in the warp bubble would be isolated from the outside.
@@ArvinAsh If a warp bubble is isolated from the outside, doesn't that imply that space outside the bubble wouldn't be affected by the bubble as it passes through the universe? Effectively meaning you wouldn't need to steer or otherwise avoid any inconvenient matter you might encounter. And doesn't that also suggest that the universe could be full of warp ships flitting around all over the shop, but we'll just never be able to see them? Which then begs the question: Could we detect such bubbles in a similar fashion to how we detect gravitational waves if one happened to pass through the detector?
@@-_James_- outside space most definitely will be affected by passing by bubble, just not by what happens in space inside this bubble. Same way as from outside perspective region beyond event horizon of a black hole is causally isolated, nevertheless "outside" is very much affected by near event horizon bubble-like surface which keeps information, causal connection and all important properties like mass, spin, velocity etc.
I am very much convinced that the speed of light is just a tip of a iceberg of a much more bigger phenomenon that is yet to be understood and to be explained.
Amazing so much I have learned through the years. From all of these great shows. And now as James Webb approaching it's final orbit,i can hardly wait for what new things we will learn when new data arrives. Amazing how clever we are, but somehow it certainly looks like our brain is wired wrong. I wonder why we struggle with all kinds of issues, because we should be able to solve these issues. Cooperation seems to be the keyword ,? Maybe a show about solutions. I think science is the best way, solving our current issues. But what do science suggest? Happy new year
I couldn't agree more. Unfortunately this is hard to happen if we keep our heads in the mud, watch reality shows more than we watch and learn science, insist on difference in color, race, ethnicity and religion, more than we see the human side of our own brothers all over the planet. Science is a huge cooperative tool but can also be misused by politics and greedy people
After watching this vid I thought of a wish. Your vids often lead me into these contemplations. Unfortunately the wish would break causality. The wish would be to see the universe from earth and our telescopes etc as it is now. Discounting objects that have naturally disappeared over the light horizon, the far, near and middle distant objects as they are now in their proper positions. So taking one example an object say 250 million light years away adjusted for its current position and any changes stellar births deaths everything up the the present. This would go for the entire visible universe. Of course it is impossible but I wonder what it would look like? The wish that breaks a universe. No Genie can comply LOL.
I recall a video made, maybe by NASA, which showed what the night sky would look like millions or years in the future. This is equivalent to your wish to see the "current" state of the universe. Do a Google search - it's on the internet somewhere. I just don't recall what website had it.
@@ArvinAsh Thank you for everything you do arvin, you along with many other people who give information like this are fucking amazing. There is no gift greater than knowledge and information, especially knowledge and information that is complex yet made easy to understand by people like you.
Isn't this what the James Webb telescope will be doing? It will look into the past by observing light that is very far away. According to NASA, the James Webb Space Telescope will focus on four main areas: first light in the universe, assembly of galaxies in the early universe, birth of stars and protoplanetary systems, and planets (including the origins of life.)
@@escobyte It's not in real time. Webb is looking back in time. For example Andromeda galaxy. Our galaxy the Milky Way and Andromeda are in a binary orbit around a point of gravity in space. The light - the stars and gas etc we see from Andromeda is 2ish million years old. I want to know what Andromeda looks like now, not how it was 2 million years ago. We're colliding with Andromeda and one day there will be Milkdromeda or Androway LOL, but 2 million years isn't much time in the scheme of things really, what about those objects out there that we routinely see that the light left hundreds of millions of years before the dinosaurs went extinct? Where are those galaxies now? What do they look like today? How have they evolved? What of the motion and arrangement of the stars within them? How has the galactic web changed? Are all the quasars gone? How many galaxies we see today have actually gone over the light horizon? That sort of thing. Due to the speed of light we can only look back in time we can't see the universe as it is NOW! I want to see it now (provided it hasn't been eaten up by some theorized under the standard model process - then I'd rather not know :)
10:30 their silhoutte is circular but they look far from spherical if you can see depth or 3D. I have some videos about this. Penrose also pointed this out in his 1959 paper on the appearance of spherical objects (hope i recall the year right)
Hi Glenn 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
Exemplary scientific and innovative and fusion of Doppler's effects and lights behavior is amazing in present context and in DIMENSIONS of science as well. Thanks
Just because everything is relative doesn't mean there's not an absolute objective reality. Human perception is subjective. But the things we perceive are objective. We just don't perceive them as they truly are at any given time.
Arvin Sahib, another excellent video, thank you. Did you ever make a video on how a photon experiences time? I would love to know that if a photon doesn’t experience time then how does it travel through space and reach us in a certain number of light years?
If flying down the Hubble Ultra Deep "corridor", how fast would we have to travel for the galaxies to appear to be moving towards us? The distances are so great that I guess the galaxies would appear stationary even at the speed of light.
I KNEW that stock footage looked older. Then the rollerblades gave it away. Not really the important take away from this video but but I found that mildly entertaining 😂
Script; animation; video editing and narration are extraordinary as always. Each and every words and sentences have lots of facts and that’s the reason many a times I watch video several time. Some of my understanding about traveling at the speed of light, not sure those are correct: 1) distance becomes irrelevant since we can reach any part of the universe in no time. 2) Traveller will have no reference and preference when & where to stop. 3) Travel/journey will look like a teleportation.
Your spaceship traveling at light speed would not last long because a collision with just one speck of cosmic dust would be like setting off a few tons of dynamite against the hull of your ship. It would disintegrate in an instant.
You have to remember that the universe is incredibly empty between stars, and even within solar systems. it would not be a stretch to detect tiny particles ahead of a ship going a significant fraction of the speed of light.
@@ArvinAsh Also, I'm having problems with the math that says to me quite frankly and quite quickly, is that the infinite acceleration that would be required from an infinite source of energy says that the occupants of such above mentioned light traveling space ship would be found pulverized into diamonds against the bulkheads of the ship by the time they reach Proxima Centauri 4.2 light years later due to the enormous acceleration required to first reach the target planet around Proxima Centauri, but then with an equal amount of infinite energy in the opposite direction for the deceleration needed to stop and say hi. These forces placed upon the occupants for their interstellar journey would create lateral acceleration forces in both directions that in terms of its equivalency to the force of gravity (not a force, but the warping of space-time caused by the presence of mass, or by acceleration), they would all be squished--first pulverized into a liquid soup, but then squished down into a millions of degrees fragmented remnants--now cooled and solidified into diamonds from all the carbon found in the human body. In a nutshell, acceleration and gravity are the same thing. The occupants of the ship would be subjected to acceleration forces equivalent to gravity greater than in the core of Jupiter that would squish and cook them into the bulkheads of the starship while on their voyage after having been subjected to the infinite energy and infinite acceleration needed to reach the speed of light. Physics and logic ruin everything. Sigh...
Just got done watching Adam Savage talk about guage blocks and how there is no empirical way to measure distance even in a stationary reference. Even classical measurements are relative.
Interesting. This video made me realize that moving at relativistic speeds would expose those in the ship to higher radiation. The faster you go, the more deadly radiation you would encounter.
The only thing that I learned from this video is to drive at least 25% speed of light, because then you will never see a red traffic light and will manage to be in work on time.
Hi Karolis 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
Well, this MIGHT just BLOW YOUR MIND, buuuuuttt this is theoretically what it looks like when it is only light produced by objects other then the space ship that would be flown. However, IF a powerful light was emitted FROM the ship, then it wouldn't go through the changes that are theorized here. I KNOW that sounds crazy, if the light source is already going the speed of light, along with the ship it's in, then how it is perceived will not change.
آروین جان سوژه ها و نوع بیان عالیه پسر, عالی!!! You are the best science-educator! I leant a great deal since discovered your presentations here, keenly following..., Thank you. بایستی گفت ***کارت واقعا درسته!*** {وقتی یه شیرازی میخاد ابراز قدردانی کنه و از اطلاعاتی که میشنوه به وجد میاد همچین جمله ای میگه!🙃}. کاش به ویدیو در مورد *آب*، از نگاه کوانتومی و ماهیت عجیب آب درست میکردی: *Memory of water!? I assume it is now proven??!* It would be great to have views on this subject which fascinats me and many others.. اینکه ایا واقعا آب تحت تاثیر محیط بیرون تغییر میکنه؟ ایا واقعا آب (ساختار/چیدمان ملکولی آب) قادر به ذخیره اطلاعاته؟! از این قبیل.. [ تا هر آنجا که خیلی esoteric نمیشه و میتونی علمی بیانش کنی. ممنون میشم]. رو این موضوع آب تحقیق میکنم اما اطلاعات قطعی خیلی کمه، و احساس میکنم جای هزاران تحقیق داره!
Time is simply the change of position. Keats’ “Ode to a Grecian” is correct: No change. light after moving from pt.A to pt.B would notice that the relative position of OTHER objects had Changed. Your box is too small.
It seems to me that any photons coming from the forward direction would be blue shifted to incredibly high energies. This would necessitate some heavy duty shielding of the spaceship from high energy photons.
What determines which is "Stationary" for a part of space, 1% moving relative to 99% the 99% is stationary, but what if 49% moving relative to 51% ? If clocks run slower the higher their velocity, is there an area of the universe where all other clocks would run faster? or is the observers clock always the one that runs faster?
Great video. But i have a question: what would happen IF you travel using the Alcubierre drive, bending the space and so ""achieving hyper luminal"" speed (I know, it would not be true hyper luminal speed, because you cannot reach it, and inside your "bubble of warped space" you aren't going faster than light, but at the end of your journey it would be as you traveled faster than light)
That's what I thought too! Would it be just a black dot that expands and consumes your whole view? Wish Ash could make a video about it in a similar fashion to this one.
All predictions in this video come from Special Relativity theory that says you can't move faster than c, so there's no interesting answer for you, at least using this theory.
It would be interesting if you explain how it may look traveling at warp space since space should be shrunk in front and expanded behind but in relative sense the velocity of the craft moving within the warp bubble should be slower than the speed of light so the effect should also be warped.
It is not quite true that we can only talk about relative velocities (is it the spaceship or the traffic light which is moving)? In a spaceship drifting far from any galaxies we could still analyse the spectrum of the microwave background radiation and if turned out to be the same in three orthogonal directions then we could confidently say we were stationary in what seems like an objectively absolute sense. If we were moving then the microwave background would be blue shifted in the direction of travel and if we were moving fast enough that could be into gamma rays which would kill everyone on board.
There's a game called "A Slower Speed of Light" that simulates relativistic doppler shift, lorentz aberration, and length contraction. The speed of light is set to a brisk jog, allowing the player to explore a human-scale environment at light speed. It's a bit of a trip, but it might help to build an intuitive understanding of relativistic effects. Or, sign up for Brilliant :)
And there is a nice video in YT explaining what you see in the game, and why,
You Won't Believe How Weird Approaching The Speed Of Light Can Get | Doppler Effect & Time Dilation
also this
A Slower Speed of Light - MIT Game Lab Relativity Engine
Just downloaded and played it. Finished in 7:01 which is very slow I think. I wanted to like it but honestly I think it is just going to look like glitches to most gamers.
Looks amazing,.going to play it.. thanks
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades...
... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos !
Arvin has become one of the greatest popular science educators in my lifetime !
Wow, I'm humbled. Thanks so much!
@@ArvinAsh Okay. If we are already hurdling through space at (what speed?) doesn't that bring us closer to attaining speed of light if we make up that difference? Instead of from a dead zero speed say from the center of the universe (calculate dead 0 speed)..I'm not messing with ya. sorry if it sounds that way.
@@healthy2202
A bit late, but just reading it now 😁
You have to remember that speed is relative. There is no absolute stand-still. So you have to think about: speed compared to what?
The fact that we can calculate how it would look when travelling closer to speed of light and use that info to create exact images using CGI is so cool and exciting. Great video. The amount of effort gone into making this video is appreciated.
While I don't disagree with you, I want to point out that we really don't know what it would look like. This could be very accurate (and most likely is) but it could also be very wrong its only speculation at this point. Very cool none the less. I am just one of those party pooping types I guess lol
@@78kasper78 Yeah, this is true. Relativity, while correct for most situations we can observe, completely breaks down in extreme conditions like at the event horizon of a black hole. This doesn't mean relativity is wrong, it just means it's incomplete and cannot describe that situation. For everyday situations with no high speeds or large masses involved, relativity will actually reduce to Newton's laws (by just making certain assumptions). Relativity will eventually be superceded by something else like M-Theory (which will reduce to relativity given certain assumptions). Relativity still makes my brain hurt though.
@@78kasper78 w
There is a fantastic game the MIT lab made and released open source called A Slower Speed of Light. Because you really can't model what looking that fast would be like reasonably, it instead slows light down to show both the color shift as well as the 'latency' and looking forward but in the past.
Moving faster than all blue light is a very strange idea. Realizing the issue isn't going that fast but rather hitting slower things at that speed (tachyons) can reframe why moving so fast can be bad no matter what way you look at it, but I think messing around with the game can put the general theory into.
The demonstrated doppler effect with colors is incredibly beautiful. One could imagine how it might be perceived if our eyes had more concepts for a wider range of radiations.
Yes, I have a link to it in the description.
@@ArvinAsh Oh oopsie hehe
I just thought of it immediately
My brain starts to go mush as soon as I consider two different reference frames
thanks for the video :D
Saw video on similar topic on very popular channel but barely understand anything. Your explanation is very simple, even a kid can understand. Keep going!
Thank you for the easy-to-understand video and explanation😃
I felt like traveling in space in 2022🛸👽
good news. you have already succeeded. we are already traveling in space.
@@healthy2202 Yes but with Earth
@@rajveerkanojiya2985 YOu still have to admit.. Its one hell of a ride. but we really need to be more careful for what we have left to work with.
Arvin,
I commend your elucidation in this video. I haven't watched any video as clear as you did explain. You answered my curiosity on how I would see the surrounding while traveling at light speed. Thanks a lot. You are awesome and gifted.
Fantastic video, Arvin. You're the best. The time spent on this video's production is greatly appreciate.
This was such a great question to answer.. Perspective on objective reality made me think about our mere existence again.. Thank you..
Arvin, so are you telling me that taking one hit of LSD is equivalent to traveling near the speed of light? 9:52 Ahahah, just kidding! Love your channel!
One of the best physics video's I've seen in a long time. Well done, Arvin.
Another lesson her should be hanging a warning sign on the front window like they do for rearview mirrors, "warning stars are closer to you than they appear when you're near light speed"
You're so brillant Arvin respect! Each video is an amazing adventure, simply your ton of voice make us feel like you're saying obvious and easy things in spite of you're talking about complex stuff... That's the real talent, your talent, you're brillant. Thank you so much i can't get enough of your videos Arvin! Happy new year and lot of success, all you deserve
Wow, thank you so much. Much appreciated.
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades...
... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos !
Arvin has become one of the greatest popular science educators in my lifetime !
@@ArvinAsh Yes , I agree with that . "Everything is relative". It is somehow disturbing . It creates a strange kind of fear in the human mind. But great video as always. 👍
"Everything is relative", I said to my teacher in history of science. He (who was also a phycisist) corrected me: "Everything is relative -- except the speed of light!" And of course he was right, C is a universal constant. But now I wonder: Would there be any relativistic effects at all, if even the speed of light was relative? And if _nothing_ was relative, how should that universe looks like?
Another well-done video. Thanks for putting out such high-quality videos.
The frame at 3:50 Just Blew My mind
After many Years I finally understood what's redshifting of light
Thanks Man You Really Explained A Complex Question Simply with A Picture
It must be said: Arvin is just *_ridiculously_* good at this.
Many thanks!
Issac arthur also explained like this video has by saying it the speed at which information can travel but we call it speed of light. Love how u make this topic easy for anyone to understand.
Another question about light and expansion of space. When we see deep space, we are seeing the "distant past", the stuff that happened in our light cone. So when we "measure the expansion of space" and see acceleration, does it not mean that we are confirming that earlier inflationary period? I mean visually, we are not seeing that space is now expanding in all directions, we are seeing that it was expanding in the past. Anything happening "now" at a great distance away is not in our light cone, so there is no equivalent of the Hubble constant for present states of the distant universe. Those events are not in our light cone...???
It's impossible to gain any current information on places far away because information can't travel faster than light.
@@Birrrrra so maybe the future is a non-trivial solution to the zeta function. We can only see what will happen next by analytic continuation of the past coming into contact with the bowshock of the unseen deterministic equations of relativity (lorentz transform). Ie, just because physics is deterministic does not mean it is predictable or uh unsurprising. Scary lol
@@haniamritdas4725 I'll be honest you lost me but it sounds neat!
@@Birrrrra haha well everyone is lost at the zeta function actually! The existence of any those solutions was predicted by Riemann to lie on the line x=1/2. If you can disprove that (by knowing all solutions somehow and one of them not being on the line) then you will win one million dollars. Yeah baby yeah (I mean if I understand the rules heh) anyways the function makes some cool pictures and there is a lot of content online about this famous problem if you are interested
When an explosion is big enough, dust becomes sentient and starts making RUclips videos.
Brilliantly explained. I'm also pleased to have confirmation that I got things pretty much right in a short story I wrote about someone travelling at almost light speed :)
Sounds like that was fun to write.
A short story to you maybe, but an epic novel to the person travelling at near light speed.
Almost?
@@PetraKann The word is applicable in the story context. Basically they are trapped in a ship that has power and is accelerating indefinitely (for billions of years, at least) but perceiving time at a very rapid rate. Hard to explain it all here but it involves uploading a mind into a machine...
@@macronencer Interesting. I like Sci-Fi. I have been working on a Sci-Fi story - more along the lines of a novel though.
It's a little cryptic as far as the plot and main themes are concerned so there is a lot of input and interpretation needed from the reader.
Not much is given away in the story apart from character interactions. In fact it's not clear where and when on the time-line the narrative is set.
Transferring a mind into a mechanistic framework is problematic. Some time ago I read a book on the Physics of Large numbers and the author revealed the largest number that he knew of which could be directly coupled to something physical in the Universe.
He mentioned numbers such as the total number of atoms in the observable Universe which is maybe around 10^80.
He moved higher and higher until he got to the largest physical number and that was the number of different neural combinations in the Human Brain. The estimate is based upon a cluster of neurons of specific size (10 or 100 from memory).
The estimate for the total number of different neural connection combinations was 10^700,000,000,000,000 (ie 10 raised to the 700 tirllion).
So unless you truncate or drastically reduce the capacity and power of the Human Brain, it would not be able to be uploaded into a device that is mechanistic and non-biological in nature. There simply arent enough atoms in the Universe to make such a device.
What was the nature of the computer in your story? A quantum computer?
I’m just a regular guy that loves sci-fi movies and novels. However, your content has quickly become part of my regular “entertainment” diet.
Almost every video you make causes me to gasp or audibly exclaim ,”holy cow!” You help me understand the wonders of scientific discovery and the amazing nature of our universe.
Thanks for what you do! I will continue to share, subscribe and support your channel!
lol, I love it, just posted on your last video like a day ago asking when the next video was coming out, and here it is lol
you made him post this!!!! :D
@@UnchartedWorlds this video was amazing fyi, I already knew about time dilation and light shifting, but the length contraction thing. That must have gone over my head all these years... I'm still processing it... so not only are you getting somewhere faster, but the distance getting there is less. but time dilation kicks in if object has mass and really throws me off now... I'm gonna have to watch the equations part of this video a few times and really process that. because from what I know of time dilation, travelling close to the speed of light send you to the future, even though from your perspective as the traveler you are getting there quicker and shorter now with length contraction. That's wacky... like I said, I gotta think about this for a bit...the length contraction thing is really mind blowing... And it's not a perspective thing... the length is actually different?! also thinking about how we should have mini telescopes in orbit around the sun going at fractions of c so we can view different spectrums of light...
I told you I read and respond to all my viewers! ha.
@@ArvinAsh I know you do :) i love it
@@ArvinAsh when you described the Doppler effect of light, seeing things behind you in the front window, I thought of the Analogy of driving in the rain. The faster you go, the more the rain appears to be going sideways, directly into the windshield. Even if it’s actually blowing in the opposite direction. If the rain were blowing sideways at 60mph, like in a hurricane, and you are driving in that same direction, the rain will appear to be falling straight down as you drive 60mph, and appear to be coming at you as you go even faster. Just like the photons leaving an object behind you, you are running into those photons that left the object at a previous time, those photons are moving away from the object behind you, but you are catching up to them as they hit the windshield (front window?) of your spaceship.
Love it! This was an exceptional video!
I wish this guy was on the table when writing screenplays for sci fi flicks. Producers and directors need him on the set. I would say maybe take some acting classes but by what I see and hear here he would nail it on the first take to get audience up to speed. but he would have to sell faster than the speed of light to sell the script. I don't think he can because that would be bending the rules. Maybe that is why 99.9% of us go faster than the speed limit. I love this guy. I admit I had to watch it a few times to catch most of it. I'll do it again to keep up to speed. lol.
Infrared and ultraviolet light would become visible.. this was nice to realise ☺️☺️
I would love to see a demo of these visual effects of traveling near light speed in virtual reality. Seems like a perfect medium for showing something like this to envision what it would actually “feel” like given VR’s immersive qualities.
Fantastic video as always, thanks for those incredible explanations Ash.
It's kind of spooky that the faster you go, visual and ultraviolet light will become X-rays and gamma-rays. They'll have to deal with that.
This is something ive always wondered in sci fi. Wouldnt a lot of light just turn into gamma rays and kill us in relativistic speeds?
Depends on your speed, but potentially, yes, unless the ship was shielded somehow.
That's where "Deflectors" comes in. Dust, Gamma and Ionizing Radiation
am blessed to have finally found this youtube dimension...absolutely stunning
This was pretty mind-melting man I loved it
Fun fact. It's true, but seems odd, that if you were going the speed of sound, or say a little faster at Mach 1.1, and something ahead of you was dangerous, (a dog in the road) if you honked the horn, sound would not reach the spot until after you passed. (hypothetical scenario, of course.)
THIS MAN HAS REMARKABLE, FLAWLESS AND UNDEFEATABLE STRENGTH AND WAY OF EXPLANATION IS JUST 🙌🙌.
THANKS ARVIN SIR FOR SUCH AMAZING VIDEOS 👍🏿👍🏿👍🏿
Travelling close to the speed of light sounds like a hell of a trip!
I love how towards the end he says objectively that there is no objective reality.
I made a comment on the pre-release video. 1 safety issue overlooked is that normal visible light can also become dangerous ionising radiation by turning into UV-C, X-Ray, Gamma Ray by the doppler effect if the spacecraft is traveling fast enough towards a light source.
Correct.
Imagine going 20% the speed of light and having to stop for a traffic light
But ahh, it's a very BUSY strip of space! lol.
I am so worried now 🤔travelling at light speed doesn't sound fun anymore and we might jump the traffic signal too. Avoiding collision is another worry.
Been falling asleep to these videos for months now, always makes me think about what we can do. Appreciate this man👌
Just gotta say the animations are out of this world.
Thank you Mister Ash. Happy New Year. I always wait eagerly for your new videos as all those are so fantastic and so educational and easily accessible for amateurs who do not work in the field of astronomy or physics. Thank you for your great videos !!
Speaking of length contraction: It would be possible to travel to the center of our galaxy and back within about 40 years. However, 52,000 years would have passed on Earth and no one would know who the astronauts were. If by then there should still be a humanity.
How does the biology work in this case? Do the people on the spaceship actually experience 40 biological years?
You make some willlld cool videos, especially for a layman like me!!! Thank you so much!!! I’m an anthro/history/behavioral studies student and here I am feeling like I’m in a Dr. Who episode!!! Love your videos Arvin!!!! It’s wonderful how you break it down so even I can wrap my mind around it!
As per usual, I knew about 80% of what was covered in this video from explanations I read for decades...
... but also as per usual, they were never explained so perfectly as when Arvin Ash does it in his videos !
Arvin has become one of the greatest popular science educators in my lifetime !
Which is the best University for history/ anthropology/ languages in the US ? Or the best 3-4 ones. My 15 year old son is deeply interested in history and he is really good at it. Knows more than his teachers , usually.
Look like?
What a nifty formula for determining the colour of the light when you’re moving or when you’re stationary.
I love Arvin's explanation, Thank You Arvin that even dullards like me can understand complex concepts. Edit : btw is it me or anyone else noticed u kinda change your intro music ?
No friend, you are not stupid
@@elam812 I Love you bro
@@VinnieBlackLodge hehe Yes
@@extraordinarygamer937
Thank you
شكرا لك
@@elam812 welcome man 😀😀
I’ve been thinking about this exact question for years asking people about it and only getting partial answers and sometimes no answers and little explanation. But now I got it. Sort of! Great job explaining this.
I have one more part, I would like to “feel”. Not great with the math.
If we did the identical same experiment, but now say moving away from earth but having a super great telescope constantly focused on earth, what would it look like moving away from earth? Ok, folks on earth from our perspective would appear to be moving slower and slower as we approached the speed of light. As we then slow down, I would assume folks on earth and the planets rotation around the sun would appear to move at the same speed as objects not in motion relative to each other and as we turn around and point the space ship facing earth and begin to accelerate, I think earth would appear to revolve around the sun faster and faster. As we slowed down to land back in earth again rotation of earth around the sun would appear to be back to normal as we got close to land on earth.
But, I also know that for earthlings maybe 50 years went by and for me, maybe only 1 year went by.
I’d love to see an animation of that with clocks on earth and spaceship and a “differential” to see how it all works and “feels”.
These animation can teach the world the beauty of our universe and this video you did today blows my mind. Its great.
Just a small request, if you too find it interesting to tackle the proposition proposed with the telescope constantly at earth and time differences I’d bet of folks would love that.
It would be fun to zoom around the universe in a game that had all effects built in including clocks on earth and spaceship and views out the front, side and rear windows.
Anyways, I am much closer to at least understanding this than I was before your video.
Thank you very much.
Stefan
Arvin, another great video, explaining a mind bending question. I enjoyed it very much. You have not lost your touch. As usual, the graphics are right up there, helping us more clearly understand your proposal. Thank you.
Hi Captain Peter 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
Not everything is relative. The speed of light in vacuum is the same for all observers; it is absolute.
But speed of light is not an attribute of some object (photon) it is measurment conclusion which is same for all observers exactly because everything is relative and conclusions are subjective :)
Awesome video Arvin, as usual! 👏👏👏👏
8:45, how could you get more photons in the direction of motion and less opposite to the direction of motion? Einstein's SR states that the speed of light remains constant so basically if one would travel at speed of light, a photons leaving our spaceship will still travel at speed of light and on the opposite, a photons travellng towards the spaceship will also travel at the speed of light 🤔
I wondered the same thing. Of course I concede I don’t have more than a rudimentary understanding of Light and its properties.
Good question! Light intensity is determined, not by the speed, but by the number of photons hitting your eyes. As you race forward, the number of photons entering your eyes is higher because you are racing towards them. The opposite happens behind you as you race away from them.
@@ArvinAsh I got the intensity of light coming from the number of photons entering the eyes. But to me, it remains the same amont whether we race forward vs racing opposite to them since they are still travelling at speed of light relative to us and thus the amount of photons should remain the same hence no difference of light intensity in my humble opinion but I m not astrophysicist 😁
However, the explanation could be that because you start to perceive objects at 90° or even behind you in your field of view, the amount of photons is way higher in front of you than behind you and thus a higher light intensity looking forward than backward. Does it make sense?
I really appreciate the time you took to answer, I was not even expecting you to answer given the amount of comments you re havng on your channel! Congrats again for your videos, I really love them.
Greetings from Belgium.
photon number is a relativistic invariant, but solid angle is not.
Hey buddy i think you miss something important in QM I=nE/At in other words the intensity of light equal to many photons multiplied by photon energy(Joule)divided by surface area( M^2) multiplied by time(Second) meaning that the I inversely proportional to time since I=n implied that that if you moving at light direction the total of light hitting to your
all body would be higher than the oppposite since your distance towards the light is closer compare to opposite direction
Oh i didn't know you use to spacetravel with Keanu Reeves, what a beatiful crew!
When I saw the topic yesterday, I mainly thought in terms of time dilation. Your talk has opened up a whole new possibility on the basis of Doppler effect. I suppose one needs a fertile imagination too for understanding relativity.
Cairo dindori
Hi Gururaj 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
If I were a science teacher, I would put my feet on the desk, maybe an eyemask, some earbuds with brown noise, and stream this video.
Excellent video. I’ve always wondered this.
The next question is what would things look like on a ship like the Enterprise traveling faster than light?
Pure black
Well, presumably they would be in a warp bubble, so inside their bubble they would not experience any time dilation or length contraction effects because they would not be moving relative to the space inside the bubble. Regarding what they would see "outside" this bubble, I am not sure. They may not see anything because the space in the warp bubble would be isolated from the outside.
@@ArvinAsh If a warp bubble is isolated from the outside, doesn't that imply that space outside the bubble wouldn't be affected by the bubble as it passes through the universe? Effectively meaning you wouldn't need to steer or otherwise avoid any inconvenient matter you might encounter. And doesn't that also suggest that the universe could be full of warp ships flitting around all over the shop, but we'll just never be able to see them? Which then begs the question: Could we detect such bubbles in a similar fashion to how we detect gravitational waves if one happened to pass through the detector?
@@-_James_- outside space most definitely will be affected by passing by bubble, just not by what happens in space inside this bubble. Same way as from outside perspective region beyond event horizon of a black hole is causally isolated, nevertheless "outside" is very much affected by near event horizon bubble-like surface which keeps information, causal connection and all important properties like mass, spin, velocity etc.
I am very much convinced that the speed of light is just a tip of a iceberg of a much more bigger phenomenon that is yet to be understood and to be explained.
As everything is in the universe my friend, as everything is
Amazing so much I have learned through the years. From all of these great shows. And now as James Webb approaching it's final orbit,i can hardly wait for what new things we will learn when new data arrives. Amazing how clever we are, but somehow it certainly looks like our brain is wired wrong. I wonder why we struggle with all kinds of issues, because we should be able to solve these issues. Cooperation seems to be the keyword ,? Maybe a show about solutions. I think science is the best way, solving our current issues. But what do science suggest? Happy new year
Indeed. The cosmic masters have said we need to start to adopt co-operation and abandon competition.
I dunno. No one improves without adapting to adverse conditions. But all adversaries are not enemies, are they.
@@haniamritdas4725 sir, what's your real name ?
Something like game theory is the closest we have to objective ethics iirc.
I couldn't agree more. Unfortunately this is hard to happen if we keep our heads in the mud, watch reality shows more than we watch and learn science, insist on difference in color, race, ethnicity and religion, more than we see the human side of our own brothers all over the planet. Science is a huge cooperative tool but can also be misused by politics and greedy people
Seeing rain drops when driving is a great explanation to this question.
After watching this vid I thought of a wish. Your vids often lead me into these contemplations.
Unfortunately the wish would break causality. The wish would be to see the universe from earth and our telescopes etc as it is now. Discounting objects that have naturally disappeared over the light horizon, the far, near and middle distant objects as they are now in their proper positions. So taking one example an object say 250 million light years away adjusted for its current position and any changes stellar births deaths everything up the the present. This would go for the entire visible universe.
Of course it is impossible but I wonder what it would look like?
The wish that breaks a universe. No Genie can comply LOL.
I recall a video made, maybe by NASA, which showed what the night sky would look like millions or years in the future. This is equivalent to your wish to see the "current" state of the universe. Do a Google search - it's on the internet somewhere. I just don't recall what website had it.
@@ArvinAsh Thank you for everything you do arvin, you along with many other people who give information like this are fucking amazing. There is no gift greater than knowledge and information, especially knowledge and information that is complex yet made easy to understand by people like you.
.
Isn't this what the James Webb telescope will be doing? It will look into the past by observing light that is very far away. According to NASA, the James Webb Space Telescope will focus on four main areas: first light in the universe, assembly of galaxies in the early universe, birth of stars and protoplanetary systems, and planets (including the origins of life.)
@@escobyte It's not in real time.
Webb is looking back in time.
For example Andromeda galaxy. Our galaxy the Milky Way and Andromeda are in a binary orbit around a point of gravity in space. The light - the stars and gas etc we see from Andromeda is 2ish million years old. I want to know what Andromeda looks like now, not how it was 2 million years ago.
We're colliding with Andromeda and one day there will be Milkdromeda or Androway LOL, but 2 million years isn't much time in the scheme of things really, what about those objects out there that we routinely see that the light left hundreds of millions of years before the dinosaurs went extinct? Where are those galaxies now? What do they look like today? How have they evolved? What of the motion and arrangement of the stars within them?
How has the galactic web changed? Are all the quasars gone? How many galaxies we see today have actually gone over the light horizon?
That sort of thing. Due to the speed of light we can only look back in time we can't see the universe as it is NOW!
I want to see it now (provided it hasn't been eaten up by some theorized under the standard model process - then I'd rather not know :)
10:30 their silhoutte is circular but they look far from spherical if you can see depth or 3D. I have some videos about this. Penrose also pointed this out in his 1959 paper on the appearance of spherical objects (hope i recall the year right)
Well done and easier to follow than anything else I have seen on the subject! thanks
Hi Glenn 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
As everyone pointed out you explained it very well and every phenomenon. I just subscribed to you. Keep up the good work.
Exemplary scientific and innovative and fusion of Doppler's effects and lights behavior is amazing in present context and in DIMENSIONS of science as well. Thanks
Everything is relative... Einstein would approve this message...
This was fascinating and very well explained, thank you.
Just because everything is relative doesn't mean there's not an absolute objective reality. Human perception is subjective. But the things we perceive are objective. We just don't perceive them as they truly are at any given time.
Arvin Sahib, another excellent video, thank you. Did you ever make a video on how a photon experiences time? I would love to know that if a photon doesn’t experience time then how does it travel through space and reach us in a certain number of light years?
If flying down the Hubble Ultra Deep "corridor", how fast would we have to travel for the galaxies to appear to be moving towards us? The distances are so great that I guess the galaxies would appear stationary even at the speed of light.
I love your philosphical discussion
Arvin & Keanu have a really fast spaceship.
I KNEW that stock footage looked older. Then the rollerblades gave it away.
Not really the important take away from this video but but I found that mildly entertaining 😂
Script; animation; video editing and narration are extraordinary as always. Each and every words and sentences have lots of facts and that’s the reason many a times I watch video several time.
Some of my understanding about traveling at the speed of light, not sure those are correct: 1) distance becomes irrelevant since we can reach any part of the universe in no time. 2) Traveller will have no reference and preference when & where to stop. 3) Travel/journey will look like a teleportation.
Arvin Ash pure brilliance!
Eye opener, indeed.
Complicated ideas with simple explanations. Nice
Had to put the bell on for your videos because they always so so enjoyable.
Your spaceship traveling at light speed would not last long because a collision with just one speck of cosmic dust would be like setting off a few tons of dynamite against the hull of your ship. It would disintegrate in an instant.
You have to remember that the universe is incredibly empty between stars, and even within solar systems. it would not be a stretch to detect tiny particles ahead of a ship going a significant fraction of the speed of light.
@@ArvinAsh Also, I'm having problems with the math that says to me quite frankly and quite quickly, is that the infinite acceleration that would be required from an infinite source of energy says that the occupants of such above mentioned light traveling space ship would be found pulverized into diamonds against the bulkheads of the ship by the time they reach Proxima Centauri 4.2 light years later due to the enormous acceleration required to first reach the target planet around Proxima Centauri, but then with an equal amount of infinite energy in the opposite direction for the deceleration needed to stop and say hi. These forces placed upon the occupants for their interstellar journey would create lateral acceleration forces in both directions that in terms of its equivalency to the force of gravity (not a force, but the warping of space-time caused by the presence of mass, or by acceleration), they would all be squished--first pulverized into a liquid soup, but then squished down into a millions of degrees fragmented remnants--now cooled and solidified into diamonds from all the carbon found in the human body. In a nutshell, acceleration and gravity are the same thing. The occupants of the ship would be subjected to acceleration forces equivalent to gravity greater than in the core of Jupiter that would squish and cook them into the bulkheads of the starship while on their voyage after having been subjected to the infinite energy and infinite acceleration needed to reach the speed of light.
Physics and logic ruin everything. Sigh...
how the spaceship traveling at different percentages of the speed of light could avoid collisions in space?
space is pretty empty.
I can’t believe how weird everything is
Just got done watching Adam Savage talk about guage blocks and how there is no empirical way to measure distance even in a stationary reference. Even classical measurements are relative.
Interesting. This video made me realize that moving at relativistic speeds would expose those in the ship to higher radiation. The faster you go, the more deadly radiation you would encounter.
The only thing that I learned from this video is to drive at least 25% speed of light, because then you will never see a red traffic light and will manage to be in work on time.
Hi Karolis 👋 I hope my comment didn't sound as a form of privacy invasion your comment tells of a wonderful woman with a beautiful heart which led me to comment I don't normally write in the comment section but I think you deserve this complement. If you don’t mind can we be friends? Thanks God bless you….
How can you not love these videos?
that now explained to me why in movies often the stars sort of retreat when ship is hitting high speed
Thank you Arvin. I always wait eagerly for your awesome videos. Your and PBS spacetime are outstanding channels.
Well, this MIGHT just BLOW YOUR MIND, buuuuuttt this is theoretically what it looks like when it is only light produced by objects other then the space ship that would be flown. However, IF a powerful light was emitted FROM the ship, then it wouldn't go through the changes that are theorized here. I KNOW that sounds crazy, if the light source is already going the speed of light, along with the ship it's in, then how it is perceived will not change.
I like to hear explanation of the exotic law of physics, like this one, what you see if you go near speed of light. I really benefit and learn
آروین جان سوژه ها و نوع بیان عالیه پسر, عالی!!!
You are the best science-educator!
I leant a great deal since discovered your presentations here, keenly following..., Thank you.
بایستی گفت ***کارت واقعا درسته!*** {وقتی یه شیرازی میخاد ابراز قدردانی کنه و از اطلاعاتی که میشنوه به وجد میاد همچین جمله ای میگه!🙃}.
کاش به ویدیو در مورد *آب*، از نگاه کوانتومی و ماهیت عجیب آب درست میکردی:
*Memory of water!? I assume it is now proven??!* It would be great to have views on this subject which fascinats me and many others..
اینکه ایا واقعا آب تحت تاثیر محیط بیرون تغییر میکنه؟ ایا واقعا آب (ساختار/چیدمان ملکولی آب) قادر به ذخیره اطلاعاته؟! از این قبیل.. [ تا هر آنجا که خیلی esoteric نمیشه و میتونی علمی بیانش کنی. ممنون میشم]. رو این موضوع آب تحقیق میکنم اما اطلاعات قطعی خیلی کمه، و احساس میکنم جای هزاران تحقیق داره!
Time is simply the change of position. Keats’ “Ode to a Grecian” is correct: No change. light after moving from pt.A to pt.B would notice that the relative position of OTHER objects had Changed. Your box is too small.
can i use doppler shift to get out of a ticket? "officer, the red light looked yellow because i was going 20% the speed of light"
You can try. I'm sure the police officer will be quite sympathetic. lol.
It would still take more than four years to get to our nearest sun and fifty thousand years to travel halfway across our own galaxy
Sure, from earth's perspective, but not from the traveler's perspective.
It seems to me that any photons coming from the forward direction would be blue shifted to incredibly high energies. This would necessitate some heavy duty shielding of the spaceship from high energy photons.
What determines which is "Stationary" for a part of space, 1% moving relative to 99% the 99% is stationary, but what if 49% moving relative to 51% ? If clocks run slower the higher their velocity, is there an area of the universe where all other clocks would run faster? or is the observers clock always the one that runs faster?
*Your universe including your body, is just a 'Holographic Simulation', displayed in a Display Register of "The Processing System of LIFE" !*
The latter, only the observer's clock. See this video for an explanation: ruclips.net/video/ZfR1Jc6Zglo/видео.html
@arvin Ash , kindly do a video for Wolfram computational universe.
Officer: You ran a red light.
Driver: Did you say at 25 percent the speed of light or regulair speed?
(Sorry... Dad joke)
Fascinating.
Great video. But i have a question: what would happen IF you travel using the Alcubierre drive, bending the space and so ""achieving hyper luminal"" speed (I know, it would not be true hyper luminal speed, because you cannot reach it, and inside your "bubble of warped space" you aren't going faster than light, but at the end of your journey it would be as you traveled faster than light)
That's what I thought too! Would it be just a black dot that expands and consumes your whole view? Wish Ash could make a video about it in a similar fashion to this one.
@@Gr3yCard1nal it would be nice also to know how does it work the time expansion factor... the relativistic effect would be still there, or not?
@@staredsky It's curious to say the least.
Don't forget your space ship traveling near the speed of light would be huge since light is massless and your ship has mass...
Arvin what would things look like if you could go 1.1C.? And let’s say 10c, I’d love to see a video on that, would you be able to see around corners?
All predictions in this video come from Special Relativity theory that says you can't move faster than c, so there's no interesting answer for you, at least using this theory.
@thedeemon - yep you nailed it!
It would be interesting if you explain how it may look traveling at warp space since space should be shrunk in front and expanded behind but in relative sense the velocity of the craft moving within the warp bubble should be slower than the speed of light so the effect should also be warped.
Very good explanation Arvin. Thanks for this video.
It is not quite true that we can only talk about relative velocities (is it the spaceship or the traffic light which is moving)? In a spaceship drifting far from any galaxies we could still analyse the spectrum of the microwave background radiation and if turned out to be the same in three orthogonal directions then we could confidently say we were stationary in what seems like an objectively absolute sense. If we were moving then the microwave background would be blue shifted in the direction of travel and if we were moving fast enough that could be into gamma rays which would kill everyone on board.