Albert Einstein's Theory of Relativity
Why Physics Stack Exchange recommends it
Physics Stack Exchange users link it as a formula-free visual illustration of time dilation and the light-clock thought experiment, often citing specific timestamps when asking or answering questions about it.
Recommended by 3 people across 3 different months, 2013 to 2022.
What it is
A 16-minute narrated animation covering both Special and General Relativity with no equations, using visual examples such as a light clock, moving observers and a line of spaceships. It is made by Eugene Khutoryansky's Physics Videos channel.
Cited in 1 Wikipedia article, including Time.
What people said
Recommends Val · 2013-07 · Physics Stack Exchange · on “How can an object with zero acceleration move?”
[this video] Which object must move and which must stand still when no force is exerted? Basically, the Newton law says that force is the thing that changes the velocity. It is correct. If you remove the resistance, your puck will slide infinitely. Resistance is the force that slows down the movement.
Recommends SimoBartz · 2020-05 · Physics Stack Exchange · on “Time dilation in a moving frame of reference”
you should consider Lorentz transform because they tell you how $A$ see the time of $B$ and vice versa. I suggest you this video, there aren't formulas and there is the example with the ray of light [this video]
Recommends Dubious · 2022-11 · Physics Stack Exchange · on “Why would a photon of light still strike mirror A at the same point that it left it?”
You said "If it was travelling normal to the mirrors in the frame of the stationary observer, it will return to point C". When I look at similar examples, it seems that the path of light to a stationary observer would not be C but as portrayed in this you-tube video from 3:09-3:52 [this video]
Cites Ray Kay · 2015-02 · Physics Stack Exchange · on “Can surrounding masses influence the speed of time (excluding the time dilation due to gravity)?”
[this video] @6:22-7:22 If you removed the middle and front spaceships, will the time of the last spaceship flow differently? As this is what it appears to suggest.
Cites spacediver · 2016-02 · Physics Stack Exchange · on “Feynman Lectures on Physics, Michelson Morley question about angle of light”
@dmckee I'm not very familiar with the concept of a diffraction halo. But I don't understand what causes the "expected deflection" in the first place. Same issue arises in 3:07 of this [this video] . Why does the beam form a zig zag from sarah's perspective? All these depictions imply that the light inherits the velocity of the source. Or are you suggesting that the part of the light beam that left the emitter was at an angle to begin with?
Cites Vinayak · 2017-06 · Physics Stack Exchange · on “An experimentation on time dilation”
In the video [this video] from 03:00 to 05:00 I hope that both the clocks would read the same equal amount ,say,1 revolution, in measuring the time elapsed for the flash to return to the laser fired. And the both Sarah and Adam may feel the time elapsed to be different in their own perspectives which might have arised from "the speed of light is same for all observers. I think i am right upto this extent. Now, Is time dilation an illusive phenomenon in which one may feel "a one single tick of a clock" which can be "one minute" for another one WHILE for both of them, the clock is universal and runs at same pace ??? Why do Sarah and Adam feel the time elapsed to be different ?? in what way ?
Cites jamie · 2020-05 · Physics Stack Exchange · on “Is the reason for not experiencing relativistic effects on yourself because your thoughts slow down?”
I will refer to this video here at 5:20, [this video] (This also applies to anything at rest relative to you, but hard to word in the title) The video says that the reason why a person traveling in a spaceship at an appreciable fraction of the speed of light does not experience effects of time dilation because the effects of "time slowing down" also apply to their thoughts and motion etc. Is this the correct reasoning? Without splitting hairs, this implies that there is an absolute time, which they are slower than. Doesn't he not feel any relativistic effects(time dilation etc), only because he is not moving relative to himself, so there is no reason for anything to be slow to begin with?