Re: Sync two clocks

Le 23/08/2024 à 13:23, "Paul.B.Andersen" a écrit :

 https://paulba.no/paper/Electrodynamics.pdf
Quote from § 1. Definition of Simultaneity:
-------------------------------------------
"If at the point A of space there is a clock, an observer at
  A can determine the time values of events in the immediate
  proximity of A by finding the positions of the hands which
  are simultaneous with these events.
  If there is at the point B of space another clock in all
  respects resembling the one at A, it is possible for an observer
  at B to determine the time values of events in the immediate
  neighbourhood of B.
  But it is not possible without further assumption to compare,
  in respect of time, an event at A with an event at B.
  We have so far defined only an “A time” and a “B time.”
  We have not defined a common “time” for A and B, for
  the latter cannot be defined at all unless we establish
  by definition that the “time” required by light to travel
  from A to B equals the “time” it requires to travel from B to A.
"
 If you can read, you will see that Einstein did say what I said.

Here is finally a solid basis.
And that is very well said.
The small drawback that remains is that Einstein proposes a definition,
but without explaining which observer will be able to consider the proposition as true.
Einstein proposes an interesting synchronization, and that I take up again by speaking of synchronization of type M,
based on an imaginary observer placed in M ​​in a teletransverse way in an abstract fourth dimension.
The problem is that he does not say it or at worst, he does not know it.
Saying "Between A and B, the speed of light is c, we know it, because we have measured it" does not make sense. Who measures this speed? A? No. B? Neither. We must therefore define things. Saying:
"My dear Jane, I bought an animal", is ridiculous.
We must say "My dear Jane, I bought for your birthday this white horse that you wanted".
This is why, for 40 years, I have been saying that this introduction needs to be rewritten in a clearer, more understandable and more obvious way.
R.H.