Re: The problem of relativistic synchronisation

Liste des GroupesRevenir à sp relativity 
Sujet : Re: The problem of relativistic synchronisation
De : python (at) *nospam* invalid.org (Python)
Groupes : sci.physics.relativity
Date : 31. Aug 2024, 12:29:45
Autres entêtes
Organisation : CCCP
Message-ID : <vaurap$vnpj$1@dont-email.me>
References : 1 2 3 4 5 6 7 8
User-Agent : Mozilla Thunderbird
Le 31/08/2024 à 08:30, Thomas Heger a écrit :
Am Freitag000030, 30.08.2024 um 18:31 schrieb Richard Hachel:
...
Einstein says:
"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."
>
And:
  "In accordance with definition the two clocks synchronize if
      tB(e2) - tA(e1) = tA(e3) - tB(e2)"
>
  tB(e2) - tA(e1) is the time the light uses to go from A to B
  tA(e3) - tB(e2) is the time the light uses to go from B to A
>
Einstein _defines_ that the clocks simultaneously show
the same (are synchronous in the stationary system)
if the time the light uses to go from A to B equals
the time the light uses to go from B to A.
  What had actually the reading of a clock to do with how fast light moves from A to B?
 This would be a non sequitur, if time would not be what clocks say.
  In fact light is here used to synchronize distant clocks.
 But that does not say, that clocks would use light to measure time.
 Usually clocks use other means than light, like pendulums or Quartz crystals.
 To syncronize distant clocks, we would need to adjust them in a way, that they tick at the same rate and show the same time.
 To measure this 'in synch' we would need to measure the delay and add this to the observed time from the remote system.
 But this step cannot be found anywhere in Einstein's paper.
You have no more excuses for this lie Thomas.

Date Sujet#  Auteur
23 Aug 24 * The problem of relativistic synchronisation102Richard Hachel
23 Aug 24 +* Re: The problem of relativistic synchronisation85Mikko
23 Aug 24 i`* Re: The problem of relativistic synchronisation84Richard Hachel
23 Aug 24 i +* Re: The problem of relativistic synchronisation82Python
30 Aug 24 i i`* Re: The problem of relativistic synchronisation81Richard Hachel
30 Aug 24 i i `* Re: The problem of relativistic synchronisation80Paul.B.Andersen
30 Aug 24 i i  +- Re: The problem of relativistic synchronisation1Python
30 Aug 24 i i  +- Re: The problem of relativistic synchronisation1Richard Hachel
31 Aug 24 i i  `* Re: The problem of relativistic synchronisation77Thomas Heger
31 Aug 24 i i   +* Re: The problem of relativistic synchronisation75Richard Hachel
31 Aug 24 i i   i+* Re: The problem of relativistic synchronisation58Paul.B.Andersen
31 Aug 24 i i   ii`* Re: The problem of relativistic synchronisation57Richard Hachel
1 Sep 24 i i   ii +- Re: The problem of relativistic synchronisation1Python
1 Sep 24 i i   ii +* Re: The problem of relativistic synchronisation53Paul.B.Andersen
1 Sep 24 i i   ii i+- Re: The problem of relativistic synchronisation1Maciej Wozniak
1 Sep 24 i i   ii i`* Re: The problem of relativistic synchronisation51Richard Hachel
1 Sep 24 i i   ii i `* Re: The problem of relativistic synchronisation50Paul.B.Andersen
1 Sep 24 i i   ii i  `* Re: The problem of relativistic synchronisation49Richard Hachel
1 Sep 24 i i   ii i   +* Re: The problem of relativistic synchronisation10Paul.B.Andersen
1 Sep 24 i i   ii i   i+* Re: The problem of relativistic synchronisation2Richard Hachel
1 Sep 24 i i   ii i   ii`- Re: The problem of relativistic synchronisation1Paul.B.Andersen
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1 Sep 24 i i   ii i    `* Re: The problem of relativistic synchronisation37Richard Hachel
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3 Sep 24 i i   ii i     ii `* Re: The problem of relativistic synchronisation3Richard Hachel
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1 Sep 24 i i   i i+* Re: The problem of relativistic synchronisation4Mikko
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1 Sep 24 i i  `* Re: The problem of relativistic synchronisation2Richard Hachel
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