Re: It's not the same thing.

Le 29/04/2024 à 12:45, Python a écrit :

Le 29/04/2024 à 03:41, Richard Hachel a écrit :
Terrence is at rest in Earth frame.
Stella is traveling to Tau Ceti at constant velocity [w.r.t Earth]
Bella is traveling with constant acceleration to Tau Ceti,
with a initial velocity of zero w.r.t Earth.
Both leave Earth and arrive at Tau Ceti together.
 You claim is that Stella and Bella will record the same duration
(proper times) for their journeys.
 Anyone who studied Relativity knows that this is false: proper
duration along an inertial space-time path is always strictly
longer than in any non-inertial path.
 But I don't even need to invoke SR to show you are contradicting
yourself (and also the Principle of Relativity) :
 Consider Bella's trajectory in Stella's inertial frame of reference,
Bella is leaving at a given non null speed, then decelerate gradually
and travel back to Bella at increasing speed.
 Now consider another traveler, say Paula, who has, in Earth frame of
reference, *exactly* the same kind of trajectory Bella has w.r.t
Stella in the Tau Ceti previous scenario.
 When asked what would be proper times on Earth clock and on Paula's
clock you agreed that they will differ.
 As Paula's cinematic in Earth frame and Bella's cinematic in Bella's
frame, and both Earth frame and Bella's frame are inertial you are
obviously contradicting yourself.
 Moreover you are violating the Principle of Relativity which states
that the same experiments in different inertial frames of reference
have necessarily the same outcomes.

Voilà qui est bien dit et remarquablement expliqué.
De telles choses manquent à la réflexion relativiste, et il serait bien de développer davantage. Tout est tellement brouillon dans l'esprit des physiciens du monde entier dès qu'on les pousse à la faute.
Je pense que tu devrais essayer des comprendre correctement ce que je dis, puis écrire des articles
relativistes parlant de choses superbes qu'on peut en tirer. Par exemple des articles comme "Le paradoxe de Langevin en vitesses apparentes" ou "le double voyage vers Tau Ceti". Moi, j'ai pas le temps.
Sinon, j'ai répondu ce jour à cette question sur fr.sci.physique.
R.H.