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Unfortunately, there is simply no possible way to measure the speed of light independently of your synchronization convention. In this case, if you use the standard isotropic synchronization conventio …

Typically we would not consider each mirror to constitute a “tick” but rather a full round trip. However, that is rather minor and is just a small semantic issue. In principle your analysis is correct …

But yet, how does light "decides" to agree (by going straight) with one point of view instead of the other ? Light doesn’t decide anything. It simply follows Maxwell’s equations. Different frames ar …

In every thought experiment we state that observers should agree on what is happening in some way. Problem is that this is not always true! If I state that observers in different frames should agree …

My question is why is it being assumed that the earth frame observer seeing that the ahead flash hits the observer in the train first imply that the train observer would also see the ahead flash firs …

it would be convenient if there was a way to synchronize the clocks perfectly (or near as darn it) The easier way is to equip the lattice clocks with radio transmitters and receivers and synchronize …

What is going wrong in this thought experiment? When analyzing a thought experiment it is important to explicitly identify which laws of physics you are using for the analysis. In this case the t …

Suppose that Angie flips a coin and wants to communicate to Billy the result of that flip. This is what is meant by “information”. She may communicate the result of the flip by drawing different symbo …

If the M and M experiment was modified to find sound’s medium would they have found it? The Michelson Morley experiment, modified for sound. Would have also obtained a null result if it were per …

There is a bit of confusion in this question. In the title it says “acceleration only in the time dimension” and in the body of the question it says “moving away in the time dimension only”. The latte …

You did not explicitly state it, but I assume that you also intend the material of the box to be very rigid such that when the pressure increases inside the resulting increased stress does not produce …

So how can we say or prove time dilation in a moving frame or disprove simultaneity using this thought experiment? Am I wrong somewhere? Let’s step away from thought experiments for a moment and …

The key to using Gauss' law is to find a good symmetry of the problem. Since you are asking about a hollow shell of charges the obvious symmetry to use is spherical symmetry. Your quarter volume does …

Are situation (1) and (2) equivalent when viewed from twin A's frame? No. The equivalence principle says that the outcome of any local experiment is the same if you are at rest in a gravitational …

We can simply derive this from the Lorentz transform. With the $x$ direction parallel and the $y$, $z$ directions perpendicular the Lorentz transform is: $$t'=\gamma \left(t-\frac{vx}{c^2} \right)$$ $ …