Einstein's Relativistic Train in a Tunnel Paradox: Special Relativity


Comments • 1 666

  • siti matahari
    siti matahari Day ago +1

    tak faham langsung

  • fredda Onekz
    fredda Onekz 2 days ago

    To hell with astro science.. I don't understand anything in it

  • Jeffrey Rivers
    Jeffrey Rivers 9 days ago

    Adam would not be trapped, he would be dead!

  • Hugo Pan
    Hugo Pan 11 days ago

    excellent video, how come some people pressed con? it's more confusing than relativity.

  • David Chary
    David Chary 12 days ago

    Nothung but useless loud ads evey time. The video was probably deleted

  • Mr V
    Mr V 14 days ago

    Could you please lose the music in the future...? Very distracting and annoying....

  • Luis Aldamiz
    Luis Aldamiz 15 days ago

    IMO in the last example the train does not fall, even in the POV of Sarah, because it travels to fast to fall: it has too much inertia or escape velocity. So the mental experiment is wrongly formulated and thus the explanation is not valid. Sarah dies as much in that example as Adam does in the second example.

    • Luis Aldamiz
      Luis Aldamiz 14 days ago

      +Physics Videos by Eugene Khutoryansky - OK... ish. But that's not how it is depicted in the video, that's not what Sarah sees.
      Also in such case I would not talk of a "hole in a bridge", but of "interstellar space", hard to see which way is down in that scenario, really.

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  14 days ago

      If the hole is large enough, for example several light years across, then the train will fall through the hole.

  • Luis Aldamiz
    Luis Aldamiz 15 days ago

    This is so useful as analogy to explain, in terms relativistic, why the Quantum Eraser and even the Delayed Choice Quantum Eraser experiments produce the results that we, as "static" observers see: because for the photons all the process is happens simultaneously, in a perfectly synchronous "now" and perfectly compacted "here" (space-time is absolutely compressed at light speed). Cool.

  • tommy cane115
    tommy cane115 18 days ago

    ask yourself this numbnuts, the radical philosopher einstein, and his nonsense theory supposes not only does "spacetime" exist... but that it "curves." If it "curves".... critical thinking time..... why doesn't it "un-curve" itself??? any guesses?

  • Robert Spar
    Robert Spar 19 days ago

    Nah... I just don't believe it. Einstein must have been blowing snow, or we have no idea what he was trying to tell us.

  • DRENS2131
    DRENS2131 22 days ago

    Ok I'm not watching any more of this just got 50 seconds in and she said Adam is traveling in the opposite direction... What direction is dictating his positive and negative x and y axis here???

  • Anuj Chitale
    Anuj Chitale 23 days ago

    Why should the train fall through the hole? If the rest-length of the train is longer than the hole, there is absolutely no reason for the train to fall down. Sarah sees it short only because of it's speed. That doesn't imply the train will actually fall down. This video uses wrong hypothetical examples to explain relativity.

    • Anuj Chitale
      Anuj Chitale 12 days ago

      +Physics Videos by Eugene Khutoryansky Yes this is correct. We both are making the same point- that train will fall if the the rest-length of hole is longer than rest-length of the train.

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  12 days ago

      As the speed of the train approaches the speed of light relative to the surroundings, the person inside the train will see all the lengths outside the train approach close to zero, including the length of a hole that would otherwise be seen as over a light year across.

    • Anuj Chitale
      Anuj Chitale 13 days ago

      +Physics Videos by Eugene Khutoryansky "Long enough" with respect to what? If the hole is light years long, then even the person in the train won't see the hole to be shrunk smaller than the train.

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  22 days ago

      If the hole is long enough, for example several light years across, then the train will fall through the hole.

  • Anuj Chitale
    Anuj Chitale 23 days ago

    Even if the train is solid, the force is never transmitted instantly. No need to think of the train as many sections.

  • Nike Pandrick
    Nike Pandrick 23 days ago

    If I was on the train I’d jump off & make a pretty stiff pass at Sarah

  • C:/Users/WindowsNT
    C:/Users/WindowsNT 24 days ago

    9:32 is the most epic game of light speed chicken.

  • Mohit Tiwari
    Mohit Tiwari 29 days ago

    I love math , science, and other logic but
    It's not good video sorry 😂😂😂😂

  • Christine LaBeach
    Christine LaBeach 29 days ago

    Why does Sarah's dress need to be so short? I mean I don't see the need to sexualize a video about special relativity.

  • The Red Wave
    The Red Wave Month ago

    I bet Sarah likes trains

  • hitesh harithas
    hitesh harithas Month ago

    In the second example , take Adams point of view , the gap is shorter than the train and hence the train passes easily .
    Now , take Sarah’s point of view , the train is shorter than the gap ,but from Adams we know that the train must pass the gap. Now device some logic to justify that in Sarah’s case also the train passes the gap.(just like we did the other way round in the video )
    Does choosing a particular reference frame first dictate the common action between both?
    Or , are both considerations analysed and the more logically seeming common action is agreed upon ?
    I know that sounds stupid 😂, but I want to know where I am wrong and what is the link I’m missing !

  • Feynstein 100
    Feynstein 100 Month ago +2

    While the first example was amazing, I think the explanation could have been much much better. For example, it illustrates one of the fundamental assumptions of special relativity: all observers must agree that events occur. They will simply disagree about when and where those events occur. In this case, the opening and closing of the two gates are two events and hence both Adam and Sarah must agree that they happen. However, they need not agree on when those two events happen. This takes us to the difference between spacelike and timelike events. In Sarah's frame of reference, the opening/closing of the two gates happens simultaneously, meaning that the two events couldn't possibly be causally related and are thus spacelike. And for spacelike events, the order of the events doesn't matter. One of the events could occur before the other, or vice versa, or they could happen at the same time. However, if the two events were causally related (and so timelike), then the results would be very different. For example, if one of the doors closed first and then sent a signal to the other door to close as well, then both Adam and Sarah would have to agree about which door closed first. Now I guess you could ask why the train being inside the tunnel doesn't count as an event, forcing both Adam and Sarah to agree that it happened. And honestly, I don't know. What counts and doesn't count as an event?

  • Eric Chambers
    Eric Chambers Month ago

    yes, but did the tunnel consent?

    VIRAJ JOSHI Month ago

    If various position of observer gives different observation then position is new criteria to define the reallity of incident in various dimensions?

  • Wolfgang Breitenseher
    Wolfgang Breitenseher 2 months ago

    Einsteins postulates are nothing but dealing with perception issues and trying to turn concepts into reality.

    • Cosmic Rift
      Cosmic Rift 2 months ago

      Wolfgang Breitenseher nope no perception issues and no optical illusions in his theory

  • Chief Quief
    Chief Quief 2 months ago

    when does the train stop acting as a solid rectangle and begin to act as many small ones. if i can lift a long pole by only holding one end of it would i not be able to do that at the speed of light, as it would fall apart as the train did ?

  • Otto Nomicus
    Otto Nomicus 2 months ago

    Here's something to ponder. Though in theory you couldn't tell which object was moving if they were moving directly toward or away from each other, you CAN tell when they are moving on courses that would mean that one moves in front of another, like a car driving along a street and you sitting on a bench parallel to the street. There's no way to replicate that effect by the car sitting still and you moving toward it, unless you move on a course which is not straight but varies direction. You would have to veer toward the car from one side and then once you got within sidewalk to street distance you would have to make a turn and veer over the other way. Obviously you would notice your varying course due to inertia, like an amusement park ride. So I guess Einstein was wrong if he said you can't tell which object is moving and which isn't, or at least which is moving faster than the other. Unless, like I said, they're either on a collision course or the exact reverse of a collision course.
    You can work out the relative motion from the time it takes for the object to pass between two lines at certain angles to each other, centered on you, and then the same angle from that point and so on, like a pie sliced up. If it's moving and will pass in front of you, the time will get shorter to pass between each successive two lines at the same angles to each other. You could probably work out how many units in which direction you are moving to how many units in which direction it is moving. I never actually tried it because it would be complicated but it seems logical that it could all be worked out with geometry and mathematics combined with a timer. I don't know whether you could actually tell if you're stationary or not, maybe, especially if there were two or more other objects to calculate the motions of in relation to you. My guess is that nothing in the universe is dead stationary. BTW, I don't see how time could vary in any of this.

  • Ants
    Ants 2 months ago

    Rip Sarah.. she didnt know she wasnt suppose to stand there...

  • JS A
    JS A 2 months ago

    Even with cartoons there will be the same group of humanoids that will not figure out the sience and will launch stupid comments.

  • Sal AveNU
    Sal AveNU 2 months ago

    That was neat !!! But again I live in New Jersey so trains going through tunnels that are closed off. And over bridges with sections missing, that made me kind of laugh. I'm planning to share this on Facebook with the comment "If Einstein Took NJ Transit"

  • Sal AveNU
    Sal AveNU 2 months ago

    A section of the bridge missing, again WHY IS THIS VIDEO BEING DONE BY NJ TRANSIT ?!?!

  • Sal AveNU
    Sal AveNU 2 months ago

    Closing Off The Tunnel !!?!? What is this New Jersey Transit !?!?!

  • Sandy J Renfroe
    Sandy J Renfroe 2 months ago

    Oh, my brain hurts. I would never have been able to figure THAT out. It's positively twisted.

  • William Yang
    William Yang 2 months ago

    Yo but what about when the train just entered the tunnel from sarah's perspective but did not hit the far wall yet since it is percieved as much shorter than the tunnel? There are no horizontal forces acting on the train yet, but the whole thing is contained

  • temp tmp
    temp tmp 2 months ago

    This still can be wrong. Yeah, I know that GPS works with Einstein's theory. But NASA used Newton's theory to push objects in space to the Moon. And according to Einstein, Newton is wrong. But it still worked, right? So it must be just a mathematical coincidence of the theory with the real world.

    • temp tmp
      temp tmp 2 months ago

      As I said, it is just mathematical coincidence. According to Einstein there is no force of attraction.

    • Arkalius80
      Arkalius80 2 months ago +1

      It's not quite true to say Newton is "wrong". That's like claiming the statement that the square root of 2 is 1.41 is wrong. Sure, it's not precisely correct, but it's a sufficiently good approximation in many cases. Newton's formulas provide results that approximate those of relativity to a very high degree of precision when the velocities involved are significantly smaller than c. Thus, they were good enough for going to the moon. Any errors that might have cropped up as a result would be much easier to simply correct later with course adjustments due to their small magnitude than it would have been to try to account for them ahead of time.

  • ashwin parekh
    ashwin parekh 2 months ago

    But if second senario is true and we can take the tunnel and train of any length initially,than doesn't that means that the train as a rigid body is infinitely compresable , because if we take the perspective of Adam and the doors are unbreakable than an infinitely long rigid train must have fitted into the tunnel.
    And also,if the train is traveling at nearly the speed of light,than according to Adam's perspective,the tunnel must have shrinked to very small place.

  • Cleo Fierro
    Cleo Fierro 2 months ago

    Sarah and Adam...there is a Third answer to all of this- Only one is right: The 'difference' is merely optical illusion.

  • Doomxeen
    Doomxeen 3 months ago

    As other commentators have clearly noticed, Sarah is way too hot for the purposes of this video haha.

  • Mario M
    Mario M 3 months ago

    While it is an interesting choice to olay Wagner wheb talking about a physicist who had to flee the Nazis, explaining the segmentation of the train via a force is misleading, as the effect is of geometric nature. I will also dream of AAAAAAAAAinstaain tonight, I assume. Still an okay explanation which does not miss the opportunity of off-topic-objectifying women.

  • Lawrence Shirley
    Lawrence Shirley 3 months ago

    I read a book on this in 1967. This was a reasonable paradox at the time but has since been mathematically explained to my satisfaction. Unfortunately, you have to dismiss the layman's understanding and instead recognize that many of the statements made are logical, but not mathematically sound.

    • Lawrence Shirley
      Lawrence Shirley 3 months ago

      BTW, if you really want to have some fun with this, then you can use the math to explain what would happen at speeds greater than the speed of light! FTL (faster than light) is not only feasible, but it has been mathematically provable and demonstratable since October 1956 when science first created FTL engines. Yes, that's right. We have had spaceships that go faster than the speed of light since 1956.

  • AlexthunderGnum
    AlexthunderGnum 3 months ago

    So what is the paradox?.. yaawn

  • scott walker
    scott walker 3 months ago

    makes no sense...how can the train be travelling at anyones perspecive at the speed of light / that train is going 10 miles an hour max....PFTTT

  • M.T Asfi
    M.T Asfi 3 months ago

    why the train size is different for Adam & Sarah.
    I'm totally confused!!

  • Ayava Kyavata
    Ayava Kyavata 3 months ago

    This is witchcraft.

  • Ayava Kyavata
    Ayava Kyavata 3 months ago


  • ꥆꥇꥑꤶꥐ ꤷꥇꥐ ꤽꤴ꥓ꤽ꥓ꤸꥐ

    Adam is wrong because Sarah (a woman) is always right.

  • Jan Fellstrom - Design
    Jan Fellstrom - Design 3 months ago

    Rubbish to ask, 'will the doors hit the train when closed?'. Physically the train has not changed. It is just an optical illusion depending on where you are standing. Not sure what that has to do with Einstein's theory.

    • Cosmic Rift
      Cosmic Rift 2 months ago

      Jan Fellstrom - Design nope this is relativity of simultaneity

  • Josh Combs
    Josh Combs 3 months ago

    For a train going the speed of light, this is a slow ass train

  • Munky Bidness
    Munky Bidness 3 months ago

    The theory of relativity is incomplete and the truth is that the train exists in a superposition until am observer measures its position, and so for Adam it'll split off into a universe in which the doors don't close at the same time / the train doesn't fall off the bridge, and for Sarah it'll split off into another universe where the train will be crushed inside the tunnel / will fall off the bridge.

    • Cosmic Rift
      Cosmic Rift 2 months ago

      Munky Bidness it’s not a coherent state so no

  • Misiulo
    Misiulo 3 months ago

    What if from Adam's perspective the special relativity is true, whereas from Sarah's perspective it is false?

  • DragonBallDave363
    DragonBallDave363 3 months ago

    So relativity States that if there are two contradictory ideas neither is correct and both are right at the same time. It shows how we can seemingly only understand on a subjective level. Nothing appears to be "universal" except the concept of relativity itself.

    • Cosmic Rift
      Cosmic Rift Month ago

      DragonBallDave363 oh that’s what you’re saying sorry 😅

    • DragonBallDave363
      DragonBallDave363 Month ago

      Cosmic Rift I get what your saying, but you keep replying with “no”.
      I’m sorry friend, but the idea of relativity does show how contradictory viewpoints can represent the same thing.
      Literally one person thinks the tunnel is longer and the other thinks the train is longer. Those are contradictory ideas.

    • Cosmic Rift
      Cosmic Rift Month ago

      DragonBallDave363 no you will observe certain events. You can check them to be the same in both reference frames by using relativity of simultaneity. From your perspective the inside of the train will never be completely trapped inside tunnel at the same train time. In other words what the train observes.

    • DragonBallDave363
      DragonBallDave363 2 months ago

      Cosmic Rift right that’s what I said. Because it varies it’s like complementary contradictions lol.
      Intuitive what be what you feel, and as the person on the train you would already know the train is longer than the tunnel, but from your perspective of observing (experiment and logic) the tunnel is longer. YOU will go all the way in the tunnel before you come out.
      It’s just like the question are we coming or going? Based on perspective the answer may vary even though the end result is the same. As you mentioned above. It’s still the same, but the views/ideas can vary. A varying perspective doesn’t change the end result, but opposite views and both point to the same thing.
      Lol after about 25 we are probably for sure going though huh? Not getting any ginger for sure!!!

    • Cosmic Rift
      Cosmic Rift 2 months ago +1

      Same universe. Same events same laws and same ,,objective interiors´´. They are whats called lorentz invariant. So Relativity lets everything what must be agreed upon by every other observer the same. The perspective however may vary. Relativity of Position over time may seem more intuitive, but it’s no more special than for example relativity of time varying over space. Intuitivity means Nothing only reason and experiment does.

  • nikhil gupta
    nikhil gupta 3 months ago

    My question is in the 2nd case if adam cross the bridge then it would mean that too short train cross the bridge in sarah perspective. So, the only explanation is time dilation with which Sarah can come up with. SO WHERE IS THE PARADOX?

  • Khaled Been Shams
    Khaled Been Shams 3 months ago


  • Peaceful Stranger
    Peaceful Stranger 3 months ago

    I can't even see the train

  • puneet dubey
    puneet dubey 3 months ago

    This video is a test of Patience.

  • avirut ghojs
    avirut ghojs 3 months ago

    Its femimost perspective.ypu al will be dead and see whthppens slaves no you dont deserve to be slave.see what is do dd.

    M3TALH3AD 3 months ago

    Mehh! Answer is simple. Women are always right. Sarah's always right and Adam is wrong. Just check for yourselves.

  • Ronit Muduli
    Ronit Muduli 3 months ago

    Sarah is a thot.

  • binayak gc
    binayak gc 3 months ago

    Maybe I've got small brain so I couldn't understand the purpose of this video.

  • jon smith
    jon smith 3 months ago

    sarah is so hot in that miniskirt

  • Michael Judd
    Michael Judd 3 months ago

    Please get rid of that god-awful music.

  • zappy bear
    zappy bear 3 months ago

    Ok, so, it makes sense that a train is made of sections as there is space between atoms and molecules. But it's super weird to think that the harder I acellerate my truck, the shorter it gets. So, if information cannot be transfered faster than light, does that mean a near light speed object with rear end propulsion will look like a pancake while traveling?

  • GRAYgoose124
    GRAYgoose124 3 months ago

    I like your videos but they're way too slow. I don't mind speeding them up, but your narrator talks too slow and there are way too many pauses. This could have been a 2 minute video, but even at 2x speed it's still 6.

  • Ansh Gupta
    Ansh Gupta 3 months ago

    The door should have to close nearly at the speed of light to do that

  • Ansh Gupta
    Ansh Gupta 3 months ago

    Somebody tell me what if I am going at speed of light and turned on my tail lights at my ships back will light be going slower

    • Ansh Gupta
      Ansh Gupta 3 months ago

      Okay now I understand the concept. It is much more than time dilation

    • Ansh Gupta
      Ansh Gupta 3 months ago

      Physics Videos by Eugene Khutoryansky I watched it thorough...what a video relativity!! I am your new fan now

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  3 months ago +1

      Light always travels at the same speed for all observers. I describe this in detail in my main video on Relativity. The link is at the top of my TheXvid home page.

  • Jose Arias-Villareal
    Jose Arias-Villareal 3 months ago

    No more doors on tunnels.

  • Cigmorfil
    Cigmorfil 3 months ago

    The reason the train fits inside the tunnel when it hits the closed exit door is nornal crash crumpling.
    Surely the train would not fall down the gap as its momentum would cause it to fly over the gap?

  • Madar Saheb
    Madar Saheb 3 months ago

    The last example was not appropriate, do you think anything travelling with nearly the speed of light can get affected with gravity , atleast not for a distance of 10^8 km.

  • Khor Mun Huai
    Khor Mun Huai 3 months ago

    To me, when something travels approximatly the speed of light. What we sees might shrink or stretch, but that does not translate the actual physical object shrinked or stretched. We sees the object shrink is because the light cannot travel faster than Light speed constant, physically the object does not shrink unless there is seriously heavy gravity working on it like the black hole.

  • CrazyLegs
    CrazyLegs 3 months ago

    I disagree.

  • Gokul R
    Gokul R 3 months ago

    So does the train's length get shorter for both Adam and Sarah?

  • MrWetnutz
    MrWetnutz 4 months ago

    This is why the US doesn't have a high speed rail system.

  • michael thompson
    michael thompson 4 months ago

    So what is the point? How is this relevant in a practical sense?

  • One Heart
    One Heart 4 months ago

    Too much waiting between one sentence and the other, I was impatient to watch the Video

  • Subrata Singha
    Subrata Singha 4 months ago

    It doesn't matter how much argument you do, Sarah is always right and even Einstein has to follow her ;)

  • bpiero
    bpiero 4 months ago

    Wtf, optical illusions are not the reality.

  • Inventors vlog
    Inventors vlog 4 months ago

    In future every theory given by Einstein or other scientists will be challenged.

  • torkamarinum
    torkamarinum 4 months ago

    No they won't, because Adam is dead...

  • Essero Eson
    Essero Eson 4 months ago

    The train is moving at the speed of light, so the doors can't close because they can't move fast enough to even start to close before the train is out the other side. Optical illusions do not actually change the shape of an object. The train never shrank, in fact it stretched quite a bit if the drive was not evenly distributed along the whole train's mass.
    Adam, never saw anything because, at the speed of light, time was stopped for him until the train slowed down to allow time to pass for him.
    If you slow the train slightly, so as not to stop time for Adam, you still can't close the doors in time since they are still bound by the physical laws of the universe, so at best, you create a collision with enough energy to destroy the planet and all life on Earth.

  • JTrost1234
    JTrost1234 4 months ago

    Question: When the train falls through the bridge, Sarah sees it fall in one piece. Does Adam see the train and himself go down in slices? When the train hits the bottom, does Adam and the train paste back together in one piece?

  • TundrumMax
    TundrumMax 4 months ago

    Wouldn't the train at the bridge simply glide over seeing as it's moving faster than gravity can pull it down?

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  4 months ago

      If the gap is long enough, for example several light years long, then the train will fall through the gap. But, if the train is travelling at near the speed of light, then from Adam's point of view, even this length would be shorter than the train. This is because as the speed approaches close to the speed of light, all lengths approach close to zero.

  • Ken Haley
    Ken Haley 4 months ago

    Good video up to the point of the train falling through the gap in the bridge. When the train reaches the gap it will begin to accelerate downward from the force of gravity at the rate of 9.8 km/sec/sec. That's virtually NOTHING, given the speed of the train. Since the train is traveling at relativistic speed it will not fall any more than a fraction of a millimeter before reaching the other side of the gap. It's as if the gap isn't even there, and both observers would see the train jumping the gap without even feeling as much of a bump as a grain of sand would cause. And the wider you make the gap the faster you have to make the train go in order for the gap to shrink to a length less than the train length from the train's frame of reference. if this experiment could actually be done, both observers would see the train easily jump the gap.

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  4 months ago

      If the gap is long enough, for example several light years long, then the train will fall through the gap. But, if the train is travelling at near the speed of light, then from Adam's point of view, even this length would be shorter than the train. This is because as the speed approaches close to the speed of light, all lengths approach close to zero.

  • Drooling Guy
    Drooling Guy 4 months ago

    This gave me headache

  • c0ldw1nd
    c0ldw1nd 4 months ago

    The shape of the locomotive looks more like an AVE S100 than like an acela express.

  • jeffery nordgulen
    jeffery nordgulen 4 months ago

    Why do u talk so slow

  • Gamers Land
    Gamers Land 4 months ago

    Bakwas animation and bhout slow bol chal...

  • Justin Ramirez
    Justin Ramirez 4 months ago

    4:03 this is what Einsteins "theory" really meant.

    THE ALL ROUNDER Cool Man 4 months ago +1

    8:01 moonlight sonata

  • Karin M
    Karin M 4 months ago

    How did I get here (this video)??

  • Songlin Zheng
    Songlin Zheng 4 months ago

    but the train did not hit the tunnel.

  • Not Sure
    Not Sure 4 months ago

    Amazing, how weird reality is.

  • Peter Nguyen
    Peter Nguyen 4 months ago

    I believe this thought experiment is wrong on so many levels, a mass, such as a train cannot be accelerated to the speed of light. How long is the train, the tunnel? The doors must close quicker than the speed of light. The train cannot fall through the hole, it will jump it, since its already at the speed of light. Contradictions contradictions.

  • Steve Roberti
    Steve Roberti 4 months ago

    This is like the barn problem from physics class.

  • D.R Conly
    D.R Conly 4 months ago

    You need to see that the train is travelling that fast, that when it approaches light speed ,Adams enclosure seems normal but time slows down ,allowing the train to follow what Sarah sees. It's simple.

  • Albert Torres
    Albert Torres 4 months ago

    When are you people going tp realize Einstein was a moron. His theories are assumptions nothing more.

    • zuluknob
      zuluknob 4 months ago

      We will see if the maths you provide can accurately predict the orbit of the moon, predict the time drift of an moving atomic clock vs a "stationary" one, can predict the lensing of light massive bodies cause ect ect ect...

    • zuluknob
      zuluknob 4 months ago

      "that test" you clearly didn't read it because it talks about several tests. Complex for me to understand, give it to me in maths i'm sure i will cope...

    • Albert Torres
      Albert Torres 4 months ago

      zuluknob And the only relative between gravity and light is the fact they are both inertial in nature. Light is micro inertia and gravity is macro inertia. It's a bit complex for you to understand I know but its not to complex.

    • Albert Torres
      Albert Torres 4 months ago

      zuluknob >>>I read it and it didn't prove anything to me because he didn't have any concept as to what Gravity is. Its not a wave but it is a type of a field but he didn't know what kind of a field. If it's an implosion field of inertia to which it is a differential between two circular motions of a planet or spacial body it wouldn't respond to that test. So go figure they don't know what gravity is as of yet. So it's fake knowledge to date.

    • zuluknob
      zuluknob 4 months ago

      en.wikipedia.org/wiki/Tests_of_general_relativity read it and weep...

  • Nick Ward
    Nick Ward 4 months ago

    Actualy from Amy's perspective she would not see the train coming at her at all because the train would be moving just as quickly as the light bouncing off of it

  • Anonymous Anonymous
    Anonymous Anonymous 4 months ago

    I think I actually will try to learn more about this. To bad it will be so painstakingly hard. I'm not very good at any math beyond integrals.

  • Akshu Gaikwad
    Akshu Gaikwad 4 months ago

    In second example train is falling down due to gravity but only black hole escape velocity is more than speed of light so I think train will continue its path in strait line

  • Paul Noel
    Paul Noel 4 months ago

    This illustrates the stupidity of "Rigid" models. These are absurd in reality. In reality perception is not reality.

  • Joshua Thebeau
    Joshua Thebeau 4 months ago

    What about a 3rd person point of view, a bystander? They will see what actually happens, that the train will hit the ledge of the concrete and knock Sarahs thot a** over and everyone's going to die because retarded Adam wanted to take some passengers for a joyride. So how would their point of views even be valid, unless you're saying 3 new parallel universes are created, Sarahs, Adams (and said passengers), and the bystander. I don't think a train loses its forward momentum and turns into multiple sections of a sandwich. I'm very confused right now :( .

  • SuperGlobalKiller
    SuperGlobalKiller 4 months ago

    When will some people realize that the train looking shorter is no more then a visual deception that will change as soon as it passes you. Second the time differences don’t apply when you are at the same position in space and thus time

    • zuluknob
      zuluknob 4 months ago

      The key word there is APPEAR it is not actually shorter, just the particle wavefronts are.
      From the moment Adam reaches LS to the moment he drops below LS zero time will have elapsed for him.
      Sarah can only see the same time on the clocks if she is equidistant from both.
      Sarah can not see the train enter the tunnel fully and both doors close because the train doesn't shrink unless it becomes a gooey adam filled smear against the far door.
      This is as bad as the achilles and the tortoise conjecture or Pi=3.14 blah blah . It may work in maths but it doesn't in reality.

    • SuperGlobalKiller
      SuperGlobalKiller 4 months ago

      Physics Videos by Eugene Khutoryansky then tell me this, when light speed had a fixed speed, yet when traveling at the speed of light time changes, and so the speed of light is fixed minus time change due to the reached speed! How fast does the light really move. Because to use the light from the sun reaches us in 8 minutes, yet for the light itself that isn’t correct. These equasions are made putting matter and matterless things in the same position. There are no two different clocks when you stand at the tunnel! Only when you are at a distance from it!

    • Physics Videos by Eugene Khutoryansky
      Physics Videos by Eugene Khutoryansky  4 months ago

      The statement above is not correct. The train will appear shorter to Sarah regardless of its position, so long as it is moving at a high speed relative to her. I cover this in detail in my main video on Relativity at thexvid.com/video/ev9zrt__lec/video.html