Why is speed of light the same (c) in all frames? (An intuitive explanation)

Рет қаралды 486,299

Күн бұрын

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

Пікірлер: 2 300

@LookingGlassUniverse 7 ай бұрын

So good!!

@Mahesh_Shenoy 7 ай бұрын

OMG OMG OMG OMG OMG OMG OMG OMG OMG OMG! Is it really you?

@harshect 7 ай бұрын

@@Mahesh_Shenoyyeah, I'm shocked too

@hinglish7813 7 ай бұрын

Please tell us referen materials?

@casualphysics840 7 ай бұрын

How did you come here lol

@VeganSemihCyprus33 7 ай бұрын

They have tricked you into slavery by false heroes 👉 The Connections (2021) [short documentary] 💖

@deriznohappehquite 5 ай бұрын

“Your honor, I was at rest, the schoolchildren were coming at me at 80 mph.”

@brandonh2065 2 ай бұрын

This needs more likes😂

@caveman3592 Ай бұрын

😂

@starkindler1134 Ай бұрын

lol that made me laugh so hard that's amazing.

@gangstadrz9326 Ай бұрын

Judges don’t understand relativity unfortunately, I learned this first hand.

@bhanukhandelwal8033 Ай бұрын

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. 😀

@SPDLand 11 күн бұрын

Never met a guy that had so much conversations with Einstein. And than sharing it with us even. Thanks Mahesh!

@TouchingClothProd 3 ай бұрын

You are the only person who has ever explained this in a way that actually makes sense to me. TY

@aneeshchauhan 4 ай бұрын

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.

@akilvarmantikvar 3 ай бұрын

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.

@davidtrindle6473 3 ай бұрын

Thank you,

@petermicic6160 2 ай бұрын

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.

@brunomartinello1114 2 ай бұрын

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.

@SeverSpanulescu 29 күн бұрын

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?

@yonip8661212 7 ай бұрын

I watched dozens of videos about relativity and this was by FAR the best. Please make more exactly like this

@EJAlexandra 5 ай бұрын

BY FAR!! So good.

@arjundhar7729 4 ай бұрын

Agree, hes done a good job. + the expression and enthusiasm.

@billant2 4 ай бұрын

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.

@chrismoreton 4 ай бұрын

I agree. All the "yes, but..." questions I've had previously were answered one by one.

@34ccsn 3 ай бұрын

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.

@jyotishman 7 ай бұрын

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.

@VeganSemihCyprus33 7 ай бұрын

They have tricked you into slavery by false heroes 👉 The Connections (2021) [short documentary] 💖

@andrewfarrar741 7 ай бұрын

@@VeganSemihCyprus33Guy no.

@everythingisalllies2141 6 ай бұрын

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.

@z08840 5 ай бұрын

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

@everythingisalllies2141 5 ай бұрын

@@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.

@sauravpatgiri7990 3 ай бұрын

This is the best explanation I have ever seen. Simplified and crystal clear.

@randomutubr222 Ай бұрын

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.

@brijeshpatel5017 7 ай бұрын

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.

@Mahesh_Shenoy 7 ай бұрын

Awesome! Will do!

@andrewfarrar741 7 ай бұрын

That's amazing @brijeshpatel5017 and I thank you for sharing. This is great content for anyone ready to step out of their own perspective.

@wesbaumguardner8829 6 ай бұрын

Because he was not a scientist and did not perform the scientific method.

@tlpineapple1 5 ай бұрын

@@wesbaumguardner8829He was and he did. Saying the opposite doesnt make it true.

@wesbaumguardner8829 5 ай бұрын

@@tlpineapple1 What experiments did he perform utilizing the scientific method? Simply stating he was a scientist does not make it true.

@dr.z1637 5 ай бұрын

As a biology PhD who is trying to learn more physics, I felt mind blown by your derivation! Keep it up!

@mihailmilev9909 5 ай бұрын

Nice!

@mihailmilev9909 5 ай бұрын

GL on your journey. What have you learned so far?

@Bjowolf2 4 ай бұрын

Maybe there is still hope for you? 😂

@y.o.2478 4 ай бұрын

@@Bjowolf2 huh?

@Bjowolf2 4 ай бұрын

@@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 😂

@connexzones 4 ай бұрын

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!

@NishanthSalahudeen 4 ай бұрын

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. 🎉

@usaturnuranus 7 ай бұрын

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.

@GMan958 4 ай бұрын

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.

@usaturnuranus 4 ай бұрын

@@GMan958 Nice! Merry Christmas and joyous holiday happenings all around!

@GMan958 4 ай бұрын

Thanks!!!

@usaturnuranus 4 ай бұрын

@@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.

@tomtoups 7 ай бұрын

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 KZfaq. 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

@Mahesh_Shenoy 7 ай бұрын

Oh man, this made my day!!!!! Thank you.

@thorwaldjohanson2526 5 ай бұрын

@@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!

@jonathanberry1111 5 ай бұрын

@@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.

@Sympanet 13 сағат бұрын

I don’t remember how I found you but this is quickly becoming one of my favorite channels

@astrospeedcuber 5 ай бұрын

This is one of the best scientific explanation videos I have ever seen. Completely blew my mind.

@hudsonjorge2000 7 ай бұрын

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.

@DownhillAllTheWay 6 ай бұрын

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.

@NishanthSalahudeen 4 ай бұрын

Socratic style

@bobstanley8376 Ай бұрын

One of the best physics communicators on KZfaq!

@reapercreeper6097 4 ай бұрын

This is the most simply explained and the most understandable videos on special relativity that i have seen on the internet

@anissbenthami 7 ай бұрын

Brilliant explanation for an extremely delicate subject 👍🏼

@Mahesh_Shenoy 7 ай бұрын

Thanks :)

@williamwalker39 5 ай бұрын

@@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!

@patrickstar7693 4 ай бұрын

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?

@cometraza 3 ай бұрын

@@williamwalker39agree with you.. there’s something missing here.. the reciprocal nature of the dilations/contractions is still unexplained

@hicsuntdracone 5 ай бұрын

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.

@melonbutters3568 4 ай бұрын

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!

@troylhester 4 ай бұрын

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!

@toyotahilux2 4 ай бұрын

Me too 😣

@FlyingFoka 5 ай бұрын

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.

@jdragyn 5 ай бұрын

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!

@HoneyBadgerLikesYou 3 ай бұрын

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

@jtmacri1 4 ай бұрын

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!

@Salvatawr 7 ай бұрын

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.

@richshealer3755 5 ай бұрын

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!

@orangel007 3 ай бұрын

It’s probably one of the best videos I have seen about relatively on KZfaq. So clearly and intuitively explained!

@rafsannafee4567 Ай бұрын

BY FAR the bestest one all over KZfaq. Thank you very much Mahesh for such wondrous explanation.

@SuperButter98 5 ай бұрын

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.

@Mahesh_Shenoy 5 ай бұрын

Thanks a lot. And welcome! :)

@ydhakal77 7 ай бұрын

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.

@KNHSynths Ай бұрын

The best explanation I've ever seen on this not-so-simple subject. Hats off to you!

@sshuckle 14 күн бұрын

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!

@antoninbacot6548 7 ай бұрын

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?

@MasterBunnyFu 7 ай бұрын

Your insight, presentation style, and energy are fantastic. I'm excited to see what you put out next!

@Mahesh_Shenoy 7 ай бұрын

Thanks, buddy! :)

@bhagyeshgaikwad6964 3 ай бұрын

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!!

@couldbeahuman8079 5 ай бұрын

thank you for simultaneously breaking by brain and making the content extremely digestible, amazing work and super entertaining

@abc1231706 5 ай бұрын

Wow, great job simplifying the ideas and you bring excited, compelling energy in your presentation. Don’t stop teaching!

@Mahesh_Shenoy 5 ай бұрын

Thanks a lot. Won't!

@robwilliams4773 6 ай бұрын

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.

@abdullahabdeen6961 3 ай бұрын

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!

@mangeshjoshi4917 4 ай бұрын

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.

@Michaelaidinboer 7 ай бұрын

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!!

@user-mc1dq5yp9b 6 ай бұрын

Did the two moths ever answer you? :)

@ALBINO1D 5 ай бұрын

Over two moths! I thought one was bad enough.🙃How many moths until you finally got it?

@prateekmishra5624 5 ай бұрын

I couldn't understand the "forbidden" part. Why is it "forbidden" to detect uniform from rest, but not "forbidden" to dilate time?

@Doozy_Titter 7 ай бұрын

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.

@mattp422 4 ай бұрын

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.

@antitactic2994 Ай бұрын

Ive been soaking this kind of stuff up for years. You're doing a great job!

@ryanm21212 7 ай бұрын

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

@ronbrinker8190 5 ай бұрын

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!

@IanWilson_furrycelt 4 ай бұрын

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!!!!

@JosephBasha 3 ай бұрын

I really appreciate your ability to provide common examples of complex concepts. Smart, interesting with great common examples. Good work.

@mrgyani 4 ай бұрын

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.

@ruebenmikoch1828 4 ай бұрын

Neither time nor space have any properties so how could they dilate or contract?

@user-vr2rq5hl6l 6 ай бұрын

What a wonderful explanation! I love your presentation! You are clear and concise, making these concepts accessible and understandable.

@DenverRacingSim 2 ай бұрын

Thank you for taking the time to share this. Very intuitive explanation!

@jpandsandy Ай бұрын

I've been looking for an explanation of this that I could understand for quite a while. Thank you so much! You did it!

@Fraser3005 6 ай бұрын

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

@HealthyDoubter 7 ай бұрын

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?

@AshokSingh-zr4mt 2 ай бұрын

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

@soorajks2774 4 ай бұрын

Great amazing explanation of Relativity theory. Thankyou so much. Please continue making such videos. This world really needs enthusiastic teachers like you. 🙏🙏

@Stonky356 5 ай бұрын

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.

@roseparis5841 7 ай бұрын

You are a phenomenal teacher!! I can't wait to see what you put out next :)

@Mahesh_Shenoy 7 ай бұрын

Thanks :)

@Divino_1 3 ай бұрын

This is such a clear explanation I could see through the explanation. I love your enthusiasm in explaining this stuff.

@ra-moonluis 2 ай бұрын

It's very nice to hear your challenges to the understanding of physics! Thanks so much for your valuables interventions!

@chandramoulimukherjee6653 7 ай бұрын

Please, I would LOVE TO see the algebra behind these. I am absolutely in love with your videos.

@sudiptoatutube 7 ай бұрын

Please go for Professor HC Verma's online lecture. kzfaq.info/get/bejne/e7Vhf6aSq7SbmXk.html

@victorbirgisson2957 7 ай бұрын

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.

@Likeblender61 5 ай бұрын

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

@ArtanisKizrath 13 күн бұрын

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.

@visheshreddy4293 3 ай бұрын

Instant sub! Such an amazingly well put description ❤

@Random-bro-______-RaNdOm 7 ай бұрын

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❤

@Mahesh_Shenoy 7 ай бұрын

Wow! That was the planned epic moment. I am so glad, it resonated with you! Thanks for letting me know. 🚀

@alimmaqsa 7 ай бұрын

I enjoy ur videos more than movies 👍

@daveboulton3897 3 ай бұрын

Wow, just discovered you, and really impressed. Great explanations and graphics. Thank you.

@rowshonniaz6234 4 ай бұрын

The only video that made me understand relativity. I can't express my joy and appreciation in words! Keep making videos!

@QualicSelf 2 ай бұрын

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

@sgiri2012 7 ай бұрын

First view.thank you for your videos. Please continue this series please cover all topics like this sir

@Mahesh_Shenoy 7 ай бұрын

Absolutely!!

@mikedensham383 4 ай бұрын

Best explanation which I - as a non physicist - I have seen so far. Great work! AND you managed to make it entertaining too 👍

@mightyjb5261 4 ай бұрын

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.

@kingplunger6033 7 ай бұрын

I would like to see a follow-up with some of the equations derived, but I understand if thats unfeasible for some reason.

@joachimfischer7444 7 ай бұрын

"here's Einstein in an open car coming towards me" - yes you clearly can identify him by HIS HAIR 😁😁😁

@froyocrew 3 ай бұрын

and his brown skin too according to the pseud who made the video

@gerontodon 6 күн бұрын

@@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.

@abakst 5 ай бұрын

Truly useful, easy to follow and your love of the subject matter comes thru in every sentence. Please keep these videos coming! Liked & subbed

@paul8683 4 ай бұрын

The story telling mixed with the ideas kept me waiting for more. Really good presentation style.

@vegitoblue7063 7 ай бұрын

You explained me a highly complex topic in small and simple pieces, you're today's generation Feynman sir ❤

@kingplunger6033 7 ай бұрын

well done. You must be a medium too, talking with feynman and einstein and all :P

@stevenmqcueen7576 Ай бұрын

The best explanation I've seen for time dilation in special relativity. Thanks, Mahesh.

@shrirangbondale2263 3 ай бұрын

Never ever thought that any teacher can explain this to me in intuitive way, i always thought that i need to brainstorm so much to understand all of this intuitively..... You are really a great teacher and KZfaq is wonderful place just because of people like you😮😮

@fvsfn 7 ай бұрын

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.

@divyajyoti1631 4 ай бұрын

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.

@YatrikShahisAwesome 2 ай бұрын

Wow that was really good and very satisfying. I enjoyed following through your line of thinking to reach a surprising and exciting conclusion. Well done!! You are a natural teacher.

@ghilmanfatih9751 5 күн бұрын

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!

@Rosetulippp 7 ай бұрын

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?

@_Future_IITian 7 ай бұрын

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.

@froyocrew 3 ай бұрын

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

@vivekgupta3692 7 ай бұрын

First Comment 😂😂

@Mahesh_Shenoy 7 ай бұрын

You rock

@anantraje5513 4 ай бұрын

This is the most beautiful explanation I have ever come across. Please make the video on further derivations.

@_Coffee4Closers 5 ай бұрын

This is a very good explanation and easily accessible by most students I think. Good job.

@fardeenahamed1347 15 күн бұрын

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❤

@ARMIN7679A 4 ай бұрын

you are a legend still got some questions but this video was the only one in the past year that i have come across and helped me grasp the idea

@xalaxie 4 ай бұрын

this is one of the better explanations I've seen. as an interested non-physicist, I've listened to and read so many explanations of this, and so far none of them make sense to me why light travels at the same speed regardless of the observer's frame of reference. this definitely comes the closest.

@NavyaMenon25 25 күн бұрын

sir, you are a big reason in my enthusiasm in physics.. never stop making these videos they are like therapy to me and it's crazy how simple and amazing things begin to look like when you explain them.💙

@aryantipnis1020 3 ай бұрын

your explanation is ON POINT. but your voice is also so soothing, made me feel sleepy both times when I watched your videos

@davidholder4982 4 ай бұрын

Thank you for taking the time and effort to produce such an entertaining and informative video. I am looking forward to the next.

@anirudhkoushik1555 4 ай бұрын

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!