Why velocities don't add up? (Relativistic velocity addition intuition)

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  • čas přidán 8. 02. 2024
  • Head to squarespace.com/floatheadphysics to save 10% off your first purchase of a website or domain using code FLOATHEADPHYSICS
    Let's explore why relative velocities don't just add up as we learnt in Newtonian mechanics. We will use the ideas of time dilation, length contraction, and relativity of simultaneity to intuitively derive the relativistic velocity addition formula.
    This video is sponsored by squarespace

Komentáře • 468

  • @Mahesh_Shenoy
    @Mahesh_Shenoy  Před 3 měsíci +5

    Head to squarespace.com/floatheadphysics to save 10% off your first purchase of a website or domain using code FLOATHEADPHYSICS

    • @Ni999
      @Ni999 Před 3 měsíci

      The final equation at 16:20 is not the same as the one at the beginning. Denominator ought to be 1+uv/c², yes?

  • @silverrahul
    @silverrahul Před 4 měsíci +177

    i have said this before and i will say it again. i am so glad that you are giving so much attention to relativity of simultaneity. It's like everyone just goes wild over time dilation and length contraction but everyone ignores relativity of simultaneity

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci +19

      Yes!!! It’s fuelled by my own frustrations of understanding relativity :)

    • @DrDeuteron
      @DrDeuteron Před 4 měsíci +5

      y = mx + b
      everyone talking about m, nobody want to b.

    • @2DKot
      @2DKot Před 4 měsíci +4

      I totally agree. I saw a lot of videos about relativity and all of them just ignored relativity of simultaneity. And because of that their explanations was hard to wrap my mind around.
      With that missing piece the whole concept looks so elegant now, thanks to this channel

    • @atticuswalker
      @atticuswalker Před 4 měsíci +3

      ​@@Mahesh_Shenoyto understand relativity. you have to abandon belief . just use observable fact. time and space are connected. where space increases density of mass. time increases its density. to match.mass in motion dosent change its shape . it changes the relative density of spacetime around it.

    • @frederf3227
      @frederf3227 Před 4 měsíci

      I say this about QM. Most people are very capable of understanding the concepts in QM. What prevents them from learning is they don't like or accept those concepts as true.

  • @samcousins3204
    @samcousins3204 Před 4 měsíci +22

    Your enthusiasm is infectious and makes your videos an absolute joy. Keep it up!

  • @CVBrennan
    @CVBrennan Před 4 měsíci +24

    You answered a question I've not understood for decades until now... in just a few minutes. Thank you.

  • @priyank5161
    @priyank5161 Před 4 měsíci +163

    Good way to start 11th grade, with this topic
    Even though its not in there ig

    • @RudraforchildEducation
      @RudraforchildEducation Před 4 měsíci

      Yeah right

    • @nicolasolton
      @nicolasolton Před 4 měsíci +1

      Ig? What is this meaning?

    • @AyushRawani_
      @AyushRawani_ Před 4 měsíci +1

      ​@@nicolasoltonig = i guess

    • @chicka-waiiamv9202
      @chicka-waiiamv9202 Před 4 měsíci +2

      How come you are starting 11th now? Boards exams aren't even complete

    • @priyank5161
      @priyank5161 Před 4 měsíci +1

      @@chicka-waiiamv9202 yeah, I meant after the boards exam r complete, this video will be a good way to set up the intuition, and feel towards the kinematics of 11th

  • @johnc4957
    @johnc4957 Před 4 měsíci +39

    Just when you thought this man was done expanding your understanding, he drops Wisdom at the end. You're cooler than the other side of the pillow, Cheers.

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci +3

      Thanks. Only for folks who stay till the end :D

  • @supermatteino8618
    @supermatteino8618 Před 4 měsíci +20

    i don't usually comment on socials but this time after a few months i'm watching your content i personally wanted to thank you for the quality of your videos and the energy you put into them

  • @venil82
    @venil82 Před 4 měsíci +7

    Great content, but dissing of Newton was not necessary

  • @starkindler1134
    @starkindler1134 Před 2 měsíci +1

    That ending though... it was just perfect. You don't just say something profound just for the sake of saying something profound, you explain for 17 minutes why it's profound without that even being the main goal of the video, and then you point that out as a side topic at the end. I feel like I completely understand what you mean by that at a core level. The quality of your videos is simply incredible. And I've never found videos that explain concepts like special relativity so intuitively, you're amazing and deserve far more subscribers.

  • @X22GJP
    @X22GJP Před 4 měsíci +27

    Been watching you for a few weeks now, and I have to say, your level of enthusiasm is contagious and so refreshing. The intuitive explanations of what are often deeply difficult subjects only serve to enhance the experience. Much respect 😊

  • @safiulislam9146
    @safiulislam9146 Před 4 měsíci +10

    Hello sir , I am Deen from Bangladesh and I wanna say that you are the best fluent teacher I have ever seen

  • @ranjitinamdar
    @ranjitinamdar Před měsícem

    This level of enthusiasm, this style and oratory is usually never found in such a scientific and mathematical content ! Amazing 👏

  • @StaticMotions
    @StaticMotions Před 4 měsíci +17

    Always a pleasure to like and comment on your videos.

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci +4

      You know ..such comments make my day :) Feel great about the community :)

    • @StaticMotions
      @StaticMotions Před 4 měsíci +1

      ​@Mahesh_Shenoy I was taught simplified methods (much less than c) growing up and find your explanations challenging yet oddly complimentary to my understanding.

    • @nicolasolton
      @nicolasolton Před 4 měsíci

      Mahesh is a good example of why India will soon be a superpower.

  • @jherbranson
    @jherbranson Před 21 dnem

    You are my favorite physics channel, and I've been looking for this exact content. Thanks a million!

  • @TheMarcsOv
    @TheMarcsOv Před 4 měsíci +5

    Dividing relativistic effects to the second velocity *v* into 3 distinct components makes it really intuitive, while also leaving *u* unchanged. As in, *u* is observed directly while *v* has to be corrected. Very good explanation :)

  • @alfonsonava8548
    @alfonsonava8548 Před 3 měsíci +1

    Haven't seen videos of this guy before, but I love his passion for the topic, plus I learned something I'd never expected, great video!

  • @alisavas9526
    @alisavas9526 Před 4 měsíci +4

    The reason why I am watching is because you make me think about things I wouldn't normally think about and that fascinates me... and of course the T-shirts :)

  • @RajaBabu-ur5kf
    @RajaBabu-ur5kf Před 4 měsíci +11

    Your drawing and animation skill have improved a lot!

  • @MichaelLPerry
    @MichaelLPerry Před 4 měsíci +3

    Your ad reads are as good as your content. I didn’t see it coming. And I absolutely love the jokes you throw in. Yes, and the physics is mind blowing too. Awesome work!

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci

      Thanks for noticing. I try. Ryan Renolds is the ultimate inspiration though.

  • @Musi_012
    @Musi_012 Před 3 měsíci

    The fact I am searching for these videos and you always post them only a few days ago is blowing my mind. Like if I wanted an answer a bit earlier i wouldn’t have found anything

  • @kriiistofel
    @kriiistofel Před 4 měsíci +1

    What a clear explanation to this topic! I've seen dozens of videos trying to explain this, yet this video is simple and brilliant at the same time! (at least from my reference frame)

  • @2DKot
    @2DKot Před 4 měsíci

    I like your videos so much. Watched only from recommendations, but now I subscribed. Thank you for a lot of great intuitive explanations and energetic, interesting delivery of information!

  • @Kuvina
    @Kuvina Před 3 měsíci +3

    Hi, this video is amazing! You cover the things I've noticed a lot of other explanations miss!

  • @sandeepjoseph3754
    @sandeepjoseph3754 Před 3 měsíci +1

    This explanation is quite exciting and intuitive. This suggests that when velocities add up, nothing happens to 'u'; the whole change happens to 'v' ( velocity w.r.t moving frame). The length contraction, time dilation and relativity of simultaneity; all conspires here to ensure that added up velocities won't exceed 'c'.

  • @bishalthapa3154
    @bishalthapa3154 Před 3 měsíci

    How could you explain it so easily? Loved it. You just earn a subscriber.

  • @varshard0
    @varshard0 Před měsícem

    I'm so glad that I had an insomnia and found your channel by accident in the middle of the night.
    I love your level of enthusiastic and ability to explain topics in such a simple and energetic manner.

  • @jeremiestern
    @jeremiestern Před 2 měsíci

    To me you have the best science channel on the platform

  • @nickrondinelli1402
    @nickrondinelli1402 Před 4 měsíci +1

    I've always wondered how much length contraction and time dilation contributed but this really helped clear things up, thanks!

  • @Kowzorz
    @Kowzorz Před 4 měsíci +4

    Incredible and succinct summary. Brilliant

  • @pavangaonkardonigadde
    @pavangaonkardonigadde Před 4 měsíci +6

    I did not knew that you are from Karnataka i am also from Karnataka specifically from uttara kannada.. i feel so great that your channel in one of the best in the world..

  • @anotherme4638
    @anotherme4638 Před 3 měsíci

    It's really amazing how you explaining/simplify these complicated concept, I really enjoyed watching this video
    thanks a lot and keep going

  • @manasyadav1993
    @manasyadav1993 Před 4 měsíci +2

    Awesome video again Mahesh. Keep killing it my dude.

  • @VascovanZeller
    @VascovanZeller Před 4 měsíci

    Congrats on your growth, but most importantly on your contagious enthusiasm. It's a joy to watch your videos. Regards

  • @daveboulton3897
    @daveboulton3897 Před 4 měsíci +1

    Mahesh, many thanks for taking a subject that is so filled with accepted formula, and breaking that down into visualisations that make it “almost” understandable to us mortals. Your delivery and enthusiasm are engaging, your personality comes across as personable and friendly, and I am humbled by the effort you are taking to bring difficult science to the masses. Again, thank you.

  • @amadeov5998
    @amadeov5998 Před 4 měsíci +1

    If I could go back and not drop out of college I’m sure it would have been my calling to go into sciences like this, I go so deep learning and watching all these kinds of physics videos but it’s really because of your amazing, easy to follow teaching style and explanation. Would do life again if I could have had teachers that were as amazing as the videos you put out. Thank you.

  • @tayyab1614
    @tayyab1614 Před 4 měsíci +3

    The most intuitive explanation i have ever heard ❤

  • @guilhermesegalla9419
    @guilhermesegalla9419 Před 4 měsíci

    I really apreciate this channel. Greetings from Brazil!!!

  • @parthhooda3713
    @parthhooda3713 Před 4 měsíci +3

    i knew it was something to do with time dilation and length contraction (coz they are always the reason) but i didn't know the exact derivation of that fresky looking formula. thank you soo much for explaining it in such a fun way!

  • @Dr.RiccoMastermind
    @Dr.RiccoMastermind Před 2 měsíci +1

    I wasnt aware that all 3 factors can really be calculated separately. It felt to me thats is like several aspects for the same dilation/contraction Lorenz Factor.
    Thank you further explaining this! 😎🇩🇪🙏

  • @ryanisber2353
    @ryanisber2353 Před 4 měsíci +11

    Can you make a video about how gravity slows time?
    How can we observe black holes merging if it takes an infinite amount of time for an object to fall in from a distant perspective?

    • @DrDeuteron
      @DrDeuteron Před 4 měsíci +3

      yeah, that's kinda weird. It's more like 2 dynamic event horizons reaching out and grabbing each other. And once it's one event horizon: game over. ring down.

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci +3

      Gravity slowing down time is coming up soon.

    • @nmarbletoe8210
      @nmarbletoe8210 Před 4 měsíci

      @@DrDeuteron yup that's the picture. and we don't need to see the black holes to see their gravity waves.

    • @jppagetoo
      @jppagetoo Před 3 měsíci

      Observation frame is everything. The photons of light emitted near the event horizon take a long time to arrive "to our observation frame". They also become red shifted below our ability to detect them. The event still happened, and took place at the time we can calculate and expect. But in our observation frame, we will never see it. All we see is a slow fade to red and freeze in place that fades away as fewer and ever redder photons arrive to our eyes/detectors.

  • @SamratDuttabdn
    @SamratDuttabdn Před 3 měsíci

    Can't believe you made Einstein and Newton's spirits talk to each other for months just for a video. Make sure to release them now.

  • @monstruonegro05
    @monstruonegro05 Před 4 měsíci

    Thanks a lot! I'm getting closer to understand it in an intuitive way! 👍🏽👍🏽

  • @jadermsantos
    @jadermsantos Před 3 měsíci

    This content is truly awesome!!!

  • @dwakeling38
    @dwakeling38 Před 4 měsíci

    Thanks for making physics more accessible!

  • @JorgeTorres-ek5qs
    @JorgeTorres-ek5qs Před 4 měsíci

    I really like how he is just as passionate about an average person understanding physics as he is with his passion of physics itself.
    There's a special place in heaven for people who firmly believe that people are smarter than they believe themselves, and just need to be reminded from time to time.

  • @krzysztofcukier4565
    @krzysztofcukier4565 Před 3 měsíci

    You’re my discovery of the week!

  • @photon434
    @photon434 Před 4 měsíci +2

    Mahesh,
    Your ability to bestow upon folks an intuitive understanding of what Einstein observed is truly amazing. Naturally, we are drawn to the impossible next. What is reality if we can alter our course through time and contract like characters in a movie, with the projector being moved closer and farther from the wall?
    If space and time are relative, then what exactly are the things we see around us? Time, Distance, and their resultant Speed do not conform to our intuition. I wonder if the reason lies in our intuitive concept of self.
    We raise our seemingly rock-solid fists in defiance at the preposterousness of Einstein’s outrageous ideas. Yet, we don’t stop to think that our fists are not rock-solid at all. They are composed of tiny particles so far apart that they cannot touch. But they are not merely particles; they are waves with no width, but with volume that can expand or contract.
    Mahesh, I trust you can correct any inaccuracies in what I have said, and I eagerly await your taking it to the next step. Please continue to challenge our understanding!

  • @Dr.RiccoMastermind
    @Dr.RiccoMastermind Před 2 měsíci +1

    An even better way of adding velocities correctly is regarding them truely as rapidities (angular speed).
    For small velocities (tiny angles) its very close to just adding the values, but c is at an asymptotic 90 degree that cant be reached
    SCIENCE ASYLUM made a nice episode for this.
    Worth to look at what is different between speed, velocity and rapidity

  • @auriuman78
    @auriuman78 Před 4 měsíci

    Thank you so much for this in depth explanation. I'll be honest and admit I never thought of this possibility because I've always just blindly accepted the speed of light as a constant until just recently.
    When I learned of the one way speed of c issue a few months ago, I started questioning a lot of things after that.

  • @DheerChawhan_112
    @DheerChawhan_112 Před 4 měsíci

    The level of efforts ur putting in your videos are highly appreciable, thanks for making such intuitive videos for us. It really helps students like me to understand higher concepts of physics without going to coaching classes. Dhanyawad 🙏

  • @ajeebmondal2955
    @ajeebmondal2955 Před 4 měsíci +3

    I love you sir, i am from Bangladesh ❤ I finished watching all your videos in 2 days. I really liked your style of explanation.❤❤

  • @colson369
    @colson369 Před 4 měsíci +1

    that sponsor transition was smooth

  • @joels7605
    @joels7605 Před 4 měsíci +2

    This channel is so good. I strongly believe that people who regurgitate equations and present that as an explanation do not understand the material they're pretending to explain.

    • @silverrahul
      @silverrahul Před 4 měsíci +2

      that is not true. people understand stuff in different ways. Some people understand through equations. equations are not some gobbledygook nonsense. They are just a way of representing some physical truth. It is when they regurgitate those equations to people who DONT understand through equations , that there is a communication and understanding gap.
      when they regurgitate those equations to other people who understand equations, then there is no such issue. in that case, equations are able to succinctly communicate something that would have been much harder to communicate otherwise.

    • @DrDeuteron
      @DrDeuteron Před 4 měsíci +1

      no, my video would be 5 seconds: velocities, v, don't add. Rapidities, w = arctanh(v/c), do. _Le Fin_ .
      Doesn't mean I don't understand it.

    • @joels7605
      @joels7605 Před 4 měsíci +1

      @@silverrahulIf you can't translate equations into intuitive spoken language, or give demonstrative metaphors you do not understand the material. You understand high school algebra. Period.

    • @silverrahul
      @silverrahul Před 4 měsíci

      @@joels7605 " _If you can't translate equations into intuitive spoken language, or give demonstrative metaphors you do not understand the material_ "
      you are missing the point of an equation, if you are looking for a simple translation into spoken language. a picture is worth a thousand words. and an equation is worth a thousand pictures.
      the whole point of an equation is to encapsulate all those words into a concise, short mathematical equation.
      Like i said earlier, people understand stuff in different ways. One kind of people are not very comfortable with mathematical equations, so they understand it better in words and statements. whereas some people are more comfortable with equations and have a good understanding of the equation and the material behind it. But, they are not necessarily good at explaining it to the first kind of people in words and sentences or metaphors. that does not mean that they dont understand the material, just that they are not meant to be great teachers or communicators.
      that is where teachers and communicators like mahesh come in. THey are good at explaining stuff. But thinking that those who are not good at explaining, do not understand it themselves is a huge fallacy.
      " _You understand high school algebra_ "
      that is what it looks like to you, because you look at those equations and only see gobbledygook algebra. others look at those equations and are able to intutively understand what is behind those equations.

  • @fayezakhtar1155
    @fayezakhtar1155 Před 3 měsíci

    THANK YOUUUUUUUUUUU SOOOOOOOOO MUCH !!!!!!
    it really increased my knowledge, 10/10

  • @thebetteryou8018
    @thebetteryou8018 Před 4 měsíci +2

    Make a video on potential difference

  • @korakatk318
    @korakatk318 Před 4 měsíci

    This video is amazing!

  • @thanoskorovilas8899
    @thanoskorovilas8899 Před 4 měsíci

    Amazing video... truly

  • @curiousburke
    @curiousburke Před 4 měsíci

    Another great video. Relativity of simultaneity to the rescue again!

  • @Wild_Pernaja
    @Wild_Pernaja Před 3 měsíci

    This video helped me to understand gravity better!!!

  • @adakot123
    @adakot123 Před 4 měsíci

    Simply brilliant 👌
    BTW, the parting thoughts are very ver deep 🙏

  • @baomao7243
    @baomao7243 Před 3 měsíci

    I used to work as an engineer on large particle accelerator drive systems.
    We had to factor in relativistic effects into both beam velocity as well as the beam trajectory in bending magnets.
    Relativity is dream for both physicists and philosophers; it stretches the mind’s concept of reality. Super fun.

  • @jmcsquared18
    @jmcsquared18 Před 4 měsíci +1

    The Lorentz transformations do this so well it's absolutely beautiful.
    One problem I gave my modern physics students is, a ball in the train is dropped, while another is thrown horizontally at the same height and same time. In the train frame, they hit the ground simultaneously, but not so in the frame watching the train go by.
    Turns out, the horizontal component of its speed in the frame watching the train is precisely the relativistic velocity addition of the train's speed and the ball's thrown speed. Because it's moving faster, time dilation makes it fall slower than the ball that was dropped.

    • @DrDeuteron
      @DrDeuteron Před 4 měsíci +2

      This is tricky, because you included gravity, which opens Pandora's GR box and gives you gravitation. In the train frame, there is a uniform gravitational field, E, from the mass (a flat planet, or infinite sheet of mass, idk), but the mass is moving relativistically and generates a graviomagnetic field, B, according to:
      curl(B) = 4piG/c^2 J + (dE/dt)/c^2
      so that the two balls feel different analog Lorentz forces:
      F = m(E + 4v x B)
      while I'm sure you're method works, there are some thought experiments where you need to consider this--I think the relativistic submarine doing an emergency blow is one of them, but I don't remember

    • @jmcsquared18
      @jmcsquared18 Před 4 měsíci +2

      @@DrDeuteron yeah I of course did this with the assumption of special relativity and Newtonian gravity only (bc these are undergrads and GR would be a nightmare at this level haha).

  • @mrhoho
    @mrhoho Před 3 měsíci

    thanks for sharing.

  • @samiraesmaili7021
    @samiraesmaili7021 Před 4 měsíci +3

    I thoroughly enjoy and benefit from your videos but I think saying Newton's addition was wrong is wrong! What he said was perfectly correct for classical velocity additions. In real life and everyday engineering we rarely reach even a tiny fraction of the speed of light. Ultimately Einstein's equations become Newton's equations at low speed and low gravity.
    Thanks for your great videos 👍🏻

    • @silverrahul
      @silverrahul Před 4 měsíci

      i think it is accurate to say newton's addition is wrong. the only reason we use it is because it is APPROXIMATELY correct at low speeds, so it being wrong is not significant enough at low speeds

  • @Kiv_rin
    @Kiv_rin Před 4 měsíci +1

    Amazing video!

  • @Narcissus833
    @Narcissus833 Před 4 měsíci

    Excellent! Thank you 😊

  • @justtry5682
    @justtry5682 Před 4 měsíci +2

    Sir please add caption it will help me a lot to understand better as my mother tongue is not English, please sir polite and humble request

  • @farikacvi
    @farikacvi Před 4 měsíci

    Hi Mahesh I want to thank you first for the content you create because it is so helpful and I am sure a lot of people are grateful to you. I had been studying electric fields and I came across uniform electric fields. I don't understand how two plates and a single battery can create a uniform electirc field can you make a video on that, I would be very thankful.

  • @wilsongomes3360
    @wilsongomes3360 Před 4 měsíci

    Excelent and nice teacher

  • @Tomyb15
    @Tomyb15 Před 4 měsíci

    Really good video.
    I feel like the only topics left in need for an intuitive explanation like this are length contraction and time dilation. Textbook derivations of the formulas are numerous but very few feel satisfying to me.
    I remember reading in one textbook that length contraction is essentially the result of an outside observer measuring the moving object at different times from the pov of the moving observer and thus looks shorter (ie. they measured the front of the vehicle before the end). However when I try to derive length contraction from the relativity of simultaneity, I get that it contracts when moving towards you but it *lengthens* when moving away (which I understand isn't correct).
    A satisfying and intuitive explanation of all these phenomena should be derivable purely from the relativity of sumultaneity in my opinion.

  • @leonard4134
    @leonard4134 Před 4 měsíci +1

    Great Video!

  • @gilbertengler9064
    @gilbertengler9064 Před 4 měsíci

    thanks! I understand!

  • @Peregringlk
    @Peregringlk Před 4 měsíci

    You're vids are amazingly crazy multiplied by crazily amazing, because it's crazy how amazing they are. I'd like more vids into the very basics of movement and velocity, like, why objects have "inertia" or what does even mean that an object "moves" without any absolute reference frame. I mean, if theres infinite reference frames, then the object "moves" at infinite different velocities according to who is watching, which is a crazy thought. I would like to understand that better. If a moving object launches a photon, it's crazy to me to think that it causes time and length disturbances about the whole universe because every point in space is a reference frame. Or is it?

  • @VertauePhysik
    @VertauePhysik Před 4 měsíci +3

    Thank you for Mahesh sir, Enistine, Maxwell for the videos, btw congratulations🎉 for 110k subscribers

  • @PramochanYaan
    @PramochanYaan Před 3 měsíci +1

    I love the word *INTUITIVELY*

  • @shatfield725
    @shatfield725 Před 4 měsíci

    Great video 👍

  • @bmuhammadthariqhumaid4670
    @bmuhammadthariqhumaid4670 Před 4 měsíci

    Can you content about quantum physics??
    Love your channel❤

  • @NoWheyHombre
    @NoWheyHombre Před 4 měsíci +1

    This is nearly the exact question I asked in one of your last videos. So thank you for, I assume, making a video just to answer me

  • @kowsarlaskar6729
    @kowsarlaskar6729 Před měsícem

    Wtf channel has this much subscriber only, it should have in millions😢

  • @paulomanuelsendimairespere3901

    You are the best I know in You Tube.

  • @robotech2566
    @robotech2566 Před 3 měsíci

    I would call you the physics 3blue1brown guy, thanks for your quality content!

  • @heheboi5794
    @heheboi5794 Před 4 měsíci +1

    Can you make a video on general theory of relativity

  • @Kyanzes
    @Kyanzes Před měsícem +1

    But if you have two photons 3 lightseconds from each other and they are moving excactly toward each other on the same line, after one second, they will be separated by 1 light second, no?

  • @nirajbista27
    @nirajbista27 Před 4 měsíci +1

    Can you also do a video on mass variation. There is a much confusion about it. Lately physicist are avoiding that thing. What about transverse and longitudinal mass variation?

  • @nskhoo5143
    @nskhoo5143 Před 3 měsíci

    How did we get uv as the time delta from relativity of simultaneity?

  • @Chrisymcmb
    @Chrisymcmb Před 4 měsíci

    Awesome man!

  • @dharmvirsingh4277
    @dharmvirsingh4277 Před 2 měsíci

    Sir I have a question. rocket A started from a point 20crores km away from a goal with a velocity of 2 lakh km/second another rocket B started from middle point at the same time with velocity of 1 lakh km/second in linear direction.What will be the relative speed of A&B as per special theory of relativity? Will they reach at the goal simultaneously or not?

  • @Robert-cd5zr
    @Robert-cd5zr Před 4 měsíci +2

    Time and space, the fabric of reality itself, adjusts to ensure the speed of light isn't exceeded

    • @Mahesh_Shenoy
      @Mahesh_Shenoy  Před 4 měsíci +1

      Actually. I think it's slightly deeper than that :)

    • @RovingTroll
      @RovingTroll Před 3 měsíci

      ​@@Mahesh_ShenoyBecause the speed of light has nothing to do with light. It's the rate at which cause and effect propagate. Massless particles such as photos just happen to travel at that speed. Hell I'd venture to say that "travel" is the wrong word to describe the behavior of photos.

  • @ronaldocabada7763
    @ronaldocabada7763 Před 4 měsíci

    I love your work, it would be great to have them translated into Spanish so we can make it reach more people.

  • @Reaction1s
    @Reaction1s Před 4 měsíci

    @1:28 beyond dimensional analysis, light can draw from all dimensions because of its wave properties. That is why c2. Does that mean a c3 particle will appear? Can a c3 transformation be repressed? Why can they seemingly disappear?

  • @dragonbmgo
    @dragonbmgo Před 4 měsíci +1

    ❤️❤️❤️ Great job! ❤️❤️❤️

  • @sanketdomkalwar5794
    @sanketdomkalwar5794 Před 4 měsíci +1

    PLEASE Make Video on " The Kardshev Scale - Human Civilization Types ".😊

  • @abrarjahin8848
    @abrarjahin8848 Před 4 měsíci +3

    the way he says from different point of views makes his videos even better

  • @roger7341
    @roger7341 Před 3 měsíci

    The CERN Large Hadron Collider is able to accelerate particles in opposite directions to within about three m/s of the speed of light in a vacuum. If two sets of particles are approaching each other in opposite directions, each traveling at about 299,792,455 m/s, what is their relative velocity at the instant of impact?

  • @Dr.RiccoMastermind
    @Dr.RiccoMastermind Před 2 měsíci +1

    How do you get from the proper distance x to a velocity v in the train?? 🤔 v should not stand for a distance

  • @TheMemesofDestruction
    @TheMemesofDestruction Před 4 měsíci

    Great Work! ^.^

  • @HarpSeal
    @HarpSeal Před 2 měsíci

    Why wasn't the velocity of the train at 0.87c also divided by the 3 factors that contribute to velocity addition? It's also moving in our frame of reference.

  • @felipeluz5035
    @felipeluz5035 Před 4 měsíci +1

    For 2 spaceships, one moving forward and another moving backwards... Is the same formula used?
    For example, in my reference frame (outside the spaceships), one spaceship is going to the right at 80% the speed of light, and the other is going to the left with 90% the speed of light... How fast will a spaceship pilot see the other spaceship moving?

    • @DrDeuteron
      @DrDeuteron Před 4 měsíci +1

      Ahh...that's not how it works. You have to start from a rest frame. So call the ships L, M, R (you are M). In L's frame, you are moving right at 0.8 (by symmetry, no formula req.). Now you see R going 0.9, so L sees R going: (0.8 + 0.9) / (1 + 0.8x0.9) = 170 / 172 = 85/86
      Now you asked about flipped sign, which was boosted out of the problem, so suppose R was going -0.9, then L sees:
      (0.8 - 0.9) / (1 - 0.8x0.9) = -10 / 28 = -5/14.
      Note that any spatial ordering of the ships is irrelevant.

    • @silverrahul
      @silverrahul Před 4 měsíci +1

      Just , use variable -v ( since second ship is going to left ) for how fast ship pilot will see other ship moving.
      then use u = .8c
      then solve the equation , for value of v.
      .9c = ( u - v )/ ( 1 - uv/c^2)

  • @jeremiestern
    @jeremiestern Před 2 měsíci

    This is great

  • @yashwanthcb
    @yashwanthcb Před 2 měsíci

    can you explain about warp drives?