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Subject: Re: Langevin's paradox again
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Date: Sun, 14 Jul 24 18:31:02 +0000
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From: Richard Hachel <r.hachel@wanadou.fr>
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Le 14/07/2024 à 19:07, "Paul.B.Andersen" a écrit :
> Den 14.07.2024 04:02, skrev Richard Hachel:

> If Stella was accelerating longitudinally, the speed would change
> and γ would be a function  of time, so the acceleration would
> obviously affect Stella's proper time.

 Absolutely not.

 Proper time is an invariant.

 Acceleration no affects anything, only improper time because speed is 
différent. 

 Acceleration is measured in the reference frame of the accelerating 
object, and as the external space that accelerates relative to it.
It is therefore both completely inactive in proper time, remains constant 
in this frame of reference, and becomes relative if it is measured in the 
observing frame of reference.

 R.H.