Why is speed of light the same (c) in all frames? (An intuitive explanation)
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- Опубликовано: 30 май 2024
- Why is the speed of light the same in all reference frames? Let's rediscover the thought experiments that led Einstein to his special theory of relativity
Chapters:
00:00 Introduction
01:15 1/3 Detect motion with particles? (Thought experiment)
04:01 Inertia doesn't allow detecting constant velocity motion
06:18 2/3 Detect motion with waves? (Thought experiment)
09:18 Medium doesn't allow detecting constant velocity motion
10:15 Constant velocity motion is RELATIVE!
11:02 3/3 Detect motion with light? (Thought experiment)
13:12 Does light break relativity?
13:46 Michelson & Morley's experiment (oversimplified)
14:20 The logical conclusion - Speed of light is same in all frames
15:32 Discovering time dilation & length contraction
19:59 Summary
So good!!
OMG OMG OMG OMG OMG OMG OMG OMG OMG OMG! Is it really you?
@@Mahesh_Shenoyyeah, I'm shocked too
Please tell us referen materials?
How did you come here lol
They have tricked you into slavery by false heroes 👉 The Connections (2021) [short documentary] 💖
“Your honor, I was at rest, the schoolchildren were coming at me at 80 mph.”
This needs more likes😂
😂
lol that made me laugh so hard that's amazing.
Judges don’t understand relativity unfortunately, I learned this first hand.
If I were the judge, I would have countered your argument at first instance by telling you that the question is not about who was in motion but who caused that motion to happen. So It was you who caused the motion of your surrounding. 😀
Never met a guy that had so much conversations with Einstein. And than sharing it with us even. Thanks Mahesh!
We need to get this guy to 1m subs. I watch a ton of science communication channels, all the heavy hitters, and this guy far and away does the best job of walking through these problems in an intuitive way.
You are the only person who has ever explained this in a way that actually makes sense to me. TY
I watched dozens of videos about relativity and this was by FAR the best. Please make more exactly like this
BY FAR!! So good.
Agree, hes done a good job. + the expression and enthusiasm.
When I was younger, the example at 15:25 boggled my mind, thinking that the speed of a spaceship and the light emitted from the spaceship's headlights would add up, and should be faster than the speed of light. LOL Silly me, now we know that the speed of light appears to be the same for all observers, both on the ship and the outside.
I agree. All the "yes, but..." questions I've had previously were answered one by one.
Evidences for Varying Speed of Light with TimeGiuseppe Pipino
Technical High School, ITIS Malignani, Udine, Italy.
DOI: 10.4236/jhepgc.2019.52022 PDF HTML XML 836 Downloads 3,392 Views Citations
Abstract
Aims: The paper explores the hypothesis that the speed of light c is decreasing over time at rate (dc/dt)=-H⋅ c, H being the Hubble constant. This hypothesis differs from the so-called tired light, in which the velocity c is supposed to vary during the journey of photons in the empty space for some frictional mechanism. In the hypothesis of the author the speed c, during this journey, is assumed constant. In this way the problems of the tired hypothesis are overcome. Methods: The paper links the variation dc/dt with the Hubble constant and infers a value of dc/dt from the difference between the value of the variation of the Earth-Moon distance measured by the Lunar Laser Ranging Experiment and the tidal effect. Results: Under the hypothesis c time varying, we explain: 1) The cosmological redshift. 2) The anomalous acceleration ap ≈ -8 × 10-10 m⋅sec-2, measured for some spacecrafts. 3) The high redshift of supernovae Ia, which seems to evidence an acceleration of the expansion of the universe. 4) The peripheral motion of stars in galaxies around their rotational centre. 5) The dilation of the light curves observed for supernovae Ia.
As a teacher, I always find it difficult to simplify the topic . But once I could prepare the topic like you did in the video, my job becomes easier.
They have tricked you into slavery by false heroes 👉 The Connections (2021) [short documentary] 💖
@@VeganSemihCyprus33Guy no.
Shame that Einsteins hypothesis is totally wrong. I mean it has unrecoverable errors that make the theory impossible nonsense. No one cares enough to discuss what the problems are. They are happy to believe the irrational.
though much simpler explanation is that speed of light is not about light but about causality, and since light is a gauge boson, carrier of e/m interaction (i.e. causality), and since interaction defines time itself - it's by definition that speed (which is derived from time) of light is the same in all inertial frames of reference
@@z08840 The speed of light is the speed of light. "Causality" is an abstract idea, not something that you can measure how fast its moving. Stop mixing up fantasy concepts with real Physics. There is no such thing as a gauge boson, that is also an idea. And a silly one at that. The measure of light speed is NOT the same in all frames of reference, that fantasy is irrational.
What an awesome video! Since high school I have not been able to capture or understand this intuition well, and 26 years later you have succeeded. Thanks so much.
I think one of the MAIN reason students can't get the intuition is that any attempt to explain relativity starts with "person in a vehicle" vs the "person standing" metaphor. That is such a counterintuitive example. Human experience of a car or train or a plane is that of a transportation machine. They move in all of human experience. To put us in the shoes of the person inside the car, and then thinking that the person standing is the one actually moving, is extremely challenging and goes against our experience of world.
I think educators should discard this example. The relative motion perspective that helped me is: Imagine two infinite escalators moving at constant velocity in opposite directions, next to each other (They don't wobble, or make sound, there are no walls, nothing to refer their motion). There is a person standing on each, and these persons have no way to tell if they are moving. Their experience is that of standing on an infinite stair. And then they cross each other. Person 1 perceives that Person 2 is moving, while Person 2 perceives that Person 1 is moving. Neither is able to tell if they are themselves moving.
Surely not the best example, but to my simple mind this example helps me more than the person in a car metaphor.
I like to think of two astronauts floating in space and moving closer to each other. Each astronaut will perceive that they are stationary themselves, and it is the other astronaut that is moving closer. There is no objective way of telling who is stationary and who is moving.
Thank you,
I am not physicist, so i am not sure how well it translates to the topic, but according to relative movement, there is even better comparison. Limit your peripheral sight in a car standing in parking lot. Then observe a neigboring carto move. You are not able to tell if is moving second car, or your brakes failed and you are the one moving.
But in the car x person standing still example one of them is moving while the other is not.. despite the fact that they can't feel wich of them is actually moving.
In your example both of them are moving.
You are in a stationary train and see another stationary train in the window. Have you ever wondered which of them suddenly begins to move?
This is the best explanation I have ever seen. Simplified and crystal clear.
This is why Einstein said "Imagination is more important than knowledge". I'm proud of myself!! 🤓Today, for the first time in my life, I imagined outcomes of special theory of relativity. Thanks Mahesh. Please do the next part of the video.
Awesome! Will do!
That's amazing @brijeshpatel5017 and I thank you for sharing. This is great content for anyone ready to step out of their own perspective.
Because he was not a scientist and did not perform the scientific method.
@@wesbaumguardner8829He was and he did. Saying the opposite doesnt make it true.
@@tlpineapple1 What experiments did he perform utilizing the scientific method? Simply stating he was a scientist does not make it true.
As a biology PhD who is trying to learn more physics, I felt mind blown by your derivation! Keep it up!
Nice!
GL on your journey. What have you learned so far?
Maybe there is still hope for you? 😂
@@Bjowolf2 huh?
@@y.o.2478 A reply to the biologist at the top of the thread, who is now taking an interest in physics incl. relativity theory 😂
😭 I almost cried from finally understanding this (and feeling stupid) after reading books and watching videos that weren’t helping me. Thank you SO much! Not only that, it was because of the way you explained how we intuitively thought everything moves, and even how we tested light based on these intuitions that I actually understood BEFORE the video ended. Right when you talked about how we could make light move faster, I thought, wait…time slows down and also distance contracts in the direction of travel! That’s it! That’s why light is STILL traveling the same speed!
Absolute mad respect!! I have been wondering about this for over 25yrs. Mugged up for exams, but could neither understand nor explain it. Looks like i finally understood why i always come across "inertial frame of reference " while reading this topic. You sire, have earned my respect today. 🎉
I have never understood more about special relativity than I do now after watching your video. You are hands down the best science teacher I have ever seen. And I subscribe to every science channel on RUclips. The first time you blew my mind was your explanation of angular momentum and electron spin. Now you have gone about and blown my mind a second time. I never thought it would even be possible to take the most complicated concepts that humanity has ever known and explain it in such an accessible way. You're channel is going to blow up. You're the next Khan Academy
Oh man, this made my day!!!!! Thank you.
@@Mahesh_ShenoyI studied aerospace engineering where there is a lot of physics involved and was always very interested in it (almost studied physics). While I didn't learn something new, your videos are absolutely fantastic and you manage to convey and instill a more intuitive understanding of complex topics. Please keep this up! High school and college / university kids everywhere will benefit greatly from these. I don't know if you have done so yet, but you should consider translating these. Or perhaps offering a lesson pack with the illustrations, where the English text can be replaced. If you need someone to help with the German side, I'd be happy to help!
@@Mahesh_Shenoy I have some challenges to the idea that the speed of light is constant: The speed of light ISN'T the same in all frames! In the 1905 paper Einstein used Lorentz equations which is based on the one way speed of light NOT being C and he NEVER EVER claimed the one way speed of light is C. The idea that it is C was added later and it is impossible, there is no math to explain how the speed of light can be C in all directions! If you ask most people, most physicists they will say that length contraction and time dilation make the speed of light C, but this ONLY works for the 2 way speed of light because a slower clock will make light seem faster in both he direction of travel and against. Lorentz contraction can help make light moving in the same direction still be C because while your velocity subtracts from it, your clock being slower means fewer tick of the clock would occur, and your ruler being shortened by contraction of space means the light has less distance to go, this speeds up the light your travel has otherwise slowed down. But what for light moving the opposite direction? Here the light would be too fast, and then a slower clock will record less time again and a shorter distance makes it shorter again! Light would be super-duper-superluminal! But you object "You can't measure the one way speed of light" Well, you can, if SR (Special Relativity) is correct then the attempts to synchronize are moving at the same speed so the one way speed of light can be measured but would always be C. If however SR is wrong and say Lorentz Ether Theory (The theory that preceded SR, makes the same predictions and not one iota of evidence disagrees with or favours SR over LET) then then while the synchronization might be an issue in a given frame, as soon as you change frame the synchronization would be insufficient to make the one way speed of light seem the same in each direction! So you can distinguish between these theories (though the experiment might not have been done) and if LET is right then there is a preferred frame, there is an Ether and time dilation and length contraction are absolute and relative to your motion through the Ether. Also I can easily give you ways to measure the preferred frame or I can give you scenarios where SR produces fatal paradoxes it can't recover from. The idea there isn't a preferred frame that it couldn't be detected is nonsense.
I've sat here for well over an hour this morning watching and rewatching this video, and for the first time I feel like I'm actually beginning to gain a decent layman's understanding of the characteristics and vagaries of the behavior of light and electromagnetic radiation in general. I really appreciate the presentation, as my son and I (both adults) really enjoy discussing physics related subjects. As a curious layman I am thankful for the easily accessible style you provide. Well done.
Fantastic conversation with your son at a dinner table:
Dad: Hey Son can you pass the salt?
Son: Dad at a relativistic speed, I would not need to pass you the salt, you can grab it yourself due to length contraction!!!
Dad: Wrong you are assuming we are travelling in opposite directions.
@@GMan958 Nice! Merry Christmas and joyous holiday happenings all around!
Thanks!!!
@@GMan958So I had another take on the dinner conversation:
Dad: Hey son, can you pass the salt?
Son: Sorry dad, but at relativistic speeds it will require near infinite levels of energy to boost your speed even in minute increments such that you might eventually hope to catch up to and pass the salt shaker given its much lower initial mass. Maybe go on a diet and we'll hope for better next time.
Dad: Tell you what, son, maybe just hand me the sodium and chlorine and I'll work it out myself.
As a historian with an interest in science, your videos are great. Thank you for the top notch content
So good. Thanks for taking the time and effort to produce this video. The clearest explanation for the layman I've seen yet, of how we arrived at an understanding of special relativity. And your enthusiasm for the subject is infectious!
The exciting dynamics you create when explains complicated stuff based on a supposed chat between you and Einstein, make things clear and so near to the audience that it feels that one can get in touch with you both. Became a big fan of your method for explaining difficult topics. Greetings.
Agreed. And it also shows the importance of coming up with a "maybe" then designing an experiment to establish the facts. Mahesh's style of explanation is superb.
Socratic style
Brilliant explanation for an extremely delicate subject 👍🏼
Thanks :)
@@Mahesh_Shenoy Relativity predicts moving inertial observers will see each others space contract and time dilate. This is a complete contradiction and shows that the effects of Relativity are not real. The only explanation is that it is an optical illusion! Also any theory based on it, like General Relativity, must also have the problem!
At 90% speed of light time passes about 50% slower. So the denominator should be 0,5... but you need to insert 0,1 for the observation to be correct? Or is it a combination of length contraction and time dilation like 50/0,5?
@@williamwalker39agree with you.. there’s something missing here.. the reciprocal nature of the dilations/contractions is still unexplained
One of the best physics communicators on RUclips!
I can't have enough of this guy's accent while explaining me in an easy way stuff about physics, he has literally my reactions to every piece of information that gets detailed, love it and appreciate it a lot, thanks!
I never really truly grasp the true meaning of the special relativity, until i watched your video. Your style of teaching is really intuitive and easy to follow, even on complex topics. Love your work, and keep doing what you're doing, cheers.
This was incredible. I really love it when educators walk us through the logic of HOW we arrived at our conclusions, including all the incorrect assumptions we made and discarded along the way. It really helps round out our understanding and motivation. This was really well made. Thanks so much
I don’t remember how I found you but this is quickly becoming one of my favorite channels
This is great: clear, easy to digest and to use to explain again. Could you do time dilation vs length contraction as a follow up? In which proportion do the 2 effects happen?
So far I've watched three of your videos. First - why we can never travel at the speed of light, second - why does light have no mass, and third - this one, why is speed of light equal in all frames. And I can say that they are amazing. The method you present a problem by asking questions regarding the previously understood explanations until you arrive at the end, at what you're trying to ultimately explain, is just great and easy to follow for anyone.
This is the most simply explained and the most understandable videos on special relativity that i have seen on the internet
When I tried to teach my kids math when they were young, I always made them cry. I wish I could harness the joy you share in these videos!
Me too 😣
Beautiful video! As a TA for a class that introduces time dilation, I haven’t seen an explanation as clear (and enthusiastic!) as this one. Great job.
Your insight, presentation style, and energy are fantastic. I'm excited to see what you put out next!
Thanks, buddy! :)
I love your explanation! Building up step by step was so good for ultimately understanding wtf time dilation is and how it explains the speed of light stuff. Thank you for this!
It’s probably one of the best videos I have seen about relatively on RUclips. So clearly and intuitively explained!
Wow. Just Wow.
I've watched dozens of videos and read countless articles about relativity. I always just don't quite get it.
This explanation is the best I've ever seen. I actually got to the end seeing what happens and not having to think, if you say so.
Also your personalizing the presentation made it a little more fun!
I already know this stuff (as well as a layperson can), but having watched a couple of your videos now, your story-telling method of delivering the information and your infectious enthusiasm have given new life to these ideas! I wish I could offer more than just words of praise, but you are a great science communicator and I look forward to watching more and gaining new perspectives on things I thought I already knew!
your channel very quickly became my favorite physics channel. Keep up the awesome vibes and brilliant explanations and I'll watch everything you post! Thank you!
BY FAR the bestest one all over RUclips. Thank you very much Mahesh for such wondrous explanation.
I have watched hundreds, if not thousands of videos on the same topic. A lot of them were great but this one greatly simplified it.
As I love teaching, I always think of how it can be explained simply and covering every part.
You have made one of the best videos.
Great.
this is the first vid I saw of yours and I subbed instantly. Your capacity to teach and communicate complicated subjects simply is beyond anything else ive seen.
Thanks a lot. And welcome! :)
After watching so many videos on time dilation i think this one satisfies the confusion my brain was having. Incredible work! Keep making such videos!!
Even after all this time of 9-5 work routine, I still deeply in love with the thought experiment of astrophysics! You really explained it in the way I did this thought provoking activity several years ago! Just wow!
Let me tell, this is the single best video on youtube right now, your explanation is something most professors do not even know about and i was looking for this explanation for over two moths now thank you so much!!
Did the two moths ever answer you? :)
Over two moths! I thought one was bad enough.🙃How many moths until you finally got it?
I couldn't understand the "forbidden" part. Why is it "forbidden" to detect uniform from rest, but not "forbidden" to dilate time?
I love the imagined conversation style of your videos. The narrative brings out a more complete background and context for the theories making them even more fascinating.
The best explanation I've ever seen on this not-so-simple subject. Hats off to you!
Dude, you are literally the best. I love the way you explain things! So captivating and simple, your passion for physics is very clear. You should be proud man. Keep up the good work!
Thank you for doing all this work. It always takes a lot of effort to understand what's happening in physics, and it's nice to have another person instead to make this effort from time to time.
Wow, great job simplifying the ideas and you bring excited, compelling energy in your presentation. Don’t stop teaching!
Thanks a lot. Won't!
The best explanation of special relativity that I have ever come across!! The combination of real world experiences with very simple exercises of logic makes it so much easier to grasp. Please continue to make videos using this approach. Count me as a new subscriber.
Ive been soaking this kind of stuff up for years. You're doing a great job!
you are a great teacher. none of the concepts in this video are new to me, but i feel like something clicked with the way you explained it
Your explanation was so good that time dilation occurred to me in the instant before you revealed it. You are a supremely gifted teacher. Subscribed!
Wow, in my 40's and that explained it better than anything I've ever seen. Thank you for describing how we got to this position of understanding in a way a 'normal' person can understand!
Amazing video. As a layperson with a sudden interest in physics, I was able to comprehend your video. Thanks!
What a wonderful explanation! I love your presentation! You are clear and concise, making these concepts accessible and understandable.
glad I stumbled onto your channel. my answer is 'yes, please do a video on the derivative equations'
also, if light is the constant and the others, length and time adjust, what happens if length is the constant? does that adjust light's speed and time in a different way?
What a fantastic video Mahesh. I am binge watching all your videos instead of wasting time watching any other OTT and it is much more than satisfying. Keep up the good work. Kudos.
Great video my man! I really liked how you took us on the journey of how Einstein came to his discoveries - it wasn't that it all just popped into his head in a single moment, it was a culmination of doing the maths again and again and thinking deeply about the real world scenarios
Please, I would LOVE TO see the algebra behind these. I am absolutely in love with your videos.
Please go for Professor HC Verma's online lecture. ruclips.net/video/EO1LCaFN7iE/видео.html
en.wikipedia.org/wiki/Derivations_of_the_Lorentz_transformations . Have yet to watch the video, but ceritas, C, falls out of the equations once you've measured empirically. the en.wikipedia.org/wiki/Vacuum_permittivity. There is no other value for C to be, without changing the measured values of the others.
Einstein took Lorentz equatiions and filled in the connection.
Honestly, if he hadn't done it, withiin a few years, someone else would have. SR was a given discovery. Now GR is a different beast.
this is the best explanation of this concept i have seen!!! thank you so much!! you are truly a gifted educator!!! thank you thank you thank you!!!!
I really appreciate your ability to provide common examples of complex concepts. Smart, interesting with great common examples. Good work.
It always blew my mind how Einstein - given the facts before him - was courageous enough to reach the logical conclusion that he did (that time can dilate and space can contract 🤯).
And you took me though every step of 'his' thought process and logical deduction. It was beautiful.
Neither time nor space have any properties so how could they dilate or contract?
You are a phenomenal teacher!! I can't wait to see what you put out next :)
Thanks :)
This is THE BEST video that I found on relativity. Till today, even though I watched a bunch of other videos, I never truly understood time dilation. But wow, what an explanation. Loved it❤
Allow me to add to the praise pile. Ive been searching for this explanation for years. I feel like I can now proceed down my physics journey
This video, which I came across by chance, is the only time I’ve come close to understanding this stuff so you have my immense thanks. I would greatly enjoy further videos like this. Thanks again.
I enjoy ur videos more than movies 👍
first time, after dozens of trials, that I really understand where special relativity comes from. I love the way you present it, very intuitive.
Thank you for taking the time to share this. Very intuitive explanation!
I would like to see a follow-up with some of the equations derived, but I understand if thats unfeasible for some reason.
"here's Einstein in an open car coming towards me" - yes you clearly can identify him by HIS HAIR 😁😁😁
and his brown skin too according to the pseud who made the video
@@froyocrew
Why is he a pseud? Don't you agree that he's explained the theory of special theory albeit in a very simplified way, or do you not agree with the theory? I think he explained it very well, but then, I don't agree with the theory.
I've been looking for an explanation of this that I could understand for quite a while. Thank you so much! You did it!
I really love this clear explanation. Thank you for this!!
The only way of wording I would argue against is claiming that detecting movement at a constant motion is 'forbidden' @20:20, which can easily be substituted by: 'since that is not what we detect in any experiments we came up with. This makes the grounds of the argument as a whole more clear.
Knew every principle you talked about already (speed of light, time dilation, motion is relative) but never had it finally click until you explained it.
Why C is the same for everyone, even if they are travelling at different speeds, I only now understand. Thank you
You can extend your medium analogy and consider that light travels in the "spacetime" medium, and the logic will still hold true. Because when spacetime itself bends or accelerates, it affects light in a similar manner as other waves are affected by their respective media in which they travel.
It's very nice to hear your challenges to the understanding of physics! Thanks so much for your valuables interventions!
This is the most understandable (for me) and simple explanation I've watched about this topic. Thanks!
Came here asking WHY speed of light is the same. Came out mind blown about the origin of the concept of time dilation and length contraction.
First view.thank you for your videos. Please continue this series please cover all topics like this sir
Absolutely!!
You are a genius. I have already watched many videos about these theories, but with you it is so simple and understandable. I thought I already understood it, but now I discover the true basis of these elements in a clear way without complicated formulas. thank you
Instant sub! Such an amazingly well put description ❤
HUGE fan of your videos!! Literally the best physics channel on youtube for ACTUALLY understanding the concepts and having some relatable topic. One BIG question about your latest one though!
At the end of the video you explain why we cant move freely in the Time dimension, because the time dimension is contracted to 0 since we are moving through the time dimension at the speed of light right?
Well what if we convert part of that time speed into spacial speed? What if we start travelling in space at 0.5c, then wouldn't the length contraction of the time dimension be lesser and allow us to move freely in the time dimension?
18:07 My freaking mind is blown sir,that was like the goosebumps scene in a great movie where u will get the title 20 minutes later.Seriously though I got goosebumps when u said “That is Time Dilation” It deserves a badass bgm for that point❤
Wow! That was the planned epic moment. I am so glad, it resonated with you! Thanks for letting me know. 🚀
well done. You must be a medium too, talking with feynman and einstein and all :P
I am very bad at understanding physics, i never understood Einstein relativity untill this video. Wonderful explanation.
This is such a clear explanation I could see through the explanation. I love your enthusiasm in explaining this stuff.
So there is nothing special with light? If we take sound wave (assuming that sound wave doesn't depend on the medium - Just assume it!!!), will the speed of sound be the same for all observers? In the same way, if we assume a particle has no inertia, will the speed of that particular particle will be the same for all the observers due to the time dilation/length contraction?
I think you get that wrong
This statement ( speed of light is constant for all observer) is made due to the results of that experiment (in which someone is flashing light to measure speed of earth) . If we assume sound do not need any medium to travel, we can do same experiment with it and we will find a loss in speed of sound.
And if particles do not have inertia(let assume somehow you manage to do a experiment of tossing a coin in air while you are traveling with speed "a m/s" ,when you toss the coin since it doesn't have inertia it will go backwards at speed "a m/s" wrt you but wrt a person standing on ground it doesn't move horizontal. )
Hope you get my point .
(By the way I am not able to process how the motion would be if objects don't have inertia. )
Please correct if I am wrong.
Sorry for bad explanation, my english is really weak.
Light is special because it doesn't need a physical medium to travel. It is an oscillation in the electromagnetic field itself, no water or air needed
You explained me a highly complex topic in small and simple pieces, you're today's generation Feynman sir ❤
What are you presenting is so so so intuitive and helpful, you're in the right way i encourage you
Wow, this was just a beautiful explanation. Every other explanation I have heard so far talks purely from the point of the discovery which always leaves me a bit unsatisfied at the end. You walked us through the eyes of discoverer and the process of landing on the solution which makes so much more sense now!
Yes please, do more videos like this! I just told my math students that a good proof is a story; you provide a magnificent example of how asking the good questions shapes the narrative, and also that we have to accept the story as it is, not force it into what it’s not because of untold assumptions. Thanks for sharing.
First Comment 😂😂
You rock
First time I’ve ever seen an explanation that wasn’t noise. The signal came through clearly. Everyone should know of this channel!
I am telling really from the bottom of my ❤️, that this video is best video of my life I have ever seen on the RUclips. And from this moment You become my ideal teacher,that I imagined.🎉
By the way, You are really hardworking Sir, I know how much time it takes to much such level of videos😊
I really want you to know that you’re a pedagogy genius, please feel proud of yourself because wow
This and your previous video I watched are pure genius, because they show to the layman exactly how this all works. Of course in this one it all came down to light (or any EM wave) having no need for a medium to travel through. Showing this alone will have more traction in helping people to truly understand the speed of light and relativity than any amount of mathematics. Brilliant stuff! :-)
what a revelation!...I went on the journey with you and enjoyed every second of it...Kudos for the passion you bring to the table...keep it up
I would like to thank my luck because of which I found this channel. I am going to start STR next semester, this helps soo much 😍
Thank you very much for this video 🫂
Best explanation ever! I hope you have a video about space and time being two aspects of the same thing. I've never got my head around that one yet. I shall check out your channel for such a video.
Mahesh, that was one super conversation with Einstein. Well explained !
I’ve had this explained to me a hundred times, but only after watching your video did it “click”! Thank You!
The only video that made me understand relativity. I can't express my joy and appreciation in words! Keep making videos!
Extremely impressive. The conversation with Einstein was a nice touch. The "escalator effect" of a medium is a new one I hadn't heard before, but it's great. Sometimes I wonder if a very advanced civilization would say to us, "Light doesn't move, you and the particles that make you do."