Ok, thanks, I think I understand that. So, we could have the same value for the clock at positions A and B because the force differs in the same proportion as the speed changes. Thank you for your explanation.
I try to understand why this experiment is wrong trying to measure the speed of light in one direction. I know that it has to be wrong but I do not see where.
I do not understand this, sorry. The force is applied at the same position CD. I do not see clearly why this matters, may I have to study more. Thanks for your answers.
If the clocks at A and B show the same time, and we only take a photo when reaching A and B but we do not stop the clocks, this would mean that we could emit a beam of light from A to B and measure the speed of light in one direction (obviously not but I do not see the error).
Lets consider the following experiment:
A-------CD-------B
where C and D are synchronized clocks (same position), while A and B are two points at the "same distance" from CD.
We move the clock C to A and take a photo Pa when it reaches A.
We move the clock D to B and take a photo Pb when it...