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Newsgroups: sci.physics.relativity
Subject: Re: Langevin's paradox again
From: nospam@de-ster.demon.nl (J. J. Lodder)
Reply-To: jjlxa31@xs4all.nl (J. J. Lodder)
Date: Mon, 8 Jul 2024 16:25:59 +0200
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Python <python@invalid.org> wrote:

> Le 08/07/2024 à 10:57, J. J. Lodder a écrit :
> > Paul B. Andersen <relativity@paulba.no> wrote:
> > 
> >> Den 04.07.2024 15:30, skrev Richard Hachel:
> >>> Langevin's paradox.
> >>> The Langevin paradox is a very serious criticism against the theory of
> >>> relativity.
> >>
> >> Langvin's paradox is another name of the "twin paradox".
> >> In 1911 Langevin gave an example of said "paradox".
> > 
> > Yes, but the French are often excessively chauvinistic.
> 
> Lengrand (aka Hachel) is. A quite ridiculous one. Most French
> are not, obviously (look at the election results :-) )

What makes you believe that the French left and the centre
are not chauvinistic?

> > Nothing is to be taken seriously
> > unless a French name can be tagged onto it.
> 
> Fact it that the twin paradox has been pointed out first
> by the French communist Paul Langevin, who was very close
> with the French/Polish twice nobel prize winner Marie Curie.

Not really, it is already explicitly in Einstein 1905.
Langevin merely invented a more dramatic hypothetical example.

And more not really, Langevin was in the first place an anti-fascist.
He didn't become a communist party member until 1944,
shortly before his death in 1946.

> Even in France, I would say especially in France, the absurd
> theory that Einstein plagiarized Poincaré has been debunked
> strongly.

There never was any basis for that beyond anti-Einstein sentiment.
Idem for the Lorentz-plagiarising,

Jan