Re: Relativistic synchronisation method

Le 17/12/2024 à 05:33, Sylvia Else a écrit :

 That was a quick segue from synchronisation. I wonder why.
  > Einstein postulates that it is invariant, but he does not explain WHY.
 That's how things run with postulates.

I hear you.
That's why it's called a postulate.
For example: we can postulate that a wooden ball falls at the same speed as an iron ball, and that in a vacuum, a feather falls as fast as a lead ball.
That's a postulate.
But it doesn't explain WHY.
Einstein doesn't know why, nor does Poincaré for that matter, the speed of light is constant by change of frame of reference. He just POSTULATES.
That shows (it's very violent to say it, but that's how it is) that Einstein didn't understand RR as well as people say, because he is unable to explain why this fact exists.
As for his method of synchronization, it is just two lines to explain that tA'-tA=2AB/c (which is true) and therefore that tB-tA=tA'-tB=AB/c but by omitting to say WHO takes the measurement of that, that is to say by believing that it is everyone. However, this is false for almost all the points constituting the reference frame, and it is only true for any point located solely on the median plane of the segment AB.
Einstein lies by default. But saying this today constitutes a revolutionary act.
R.H.