Re: Sync two clocks

On Sat, 17 Aug 2024 8:56:06 +0000, Richard Hachel wrote:

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Le 17/08/2024 à 10:26, Mikko a écrit :

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Richard Hachel wrote:

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FOR A:
tB-t1=2AB/c
t2-tB=0
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FOR B:
tB-t1=0
t2-tB=2AB/c

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t1, t2, tB, AB, c, and 0 are numbers. Numbers are the same for
everyone, including A and B, and therefore the realtions between
the numbers are the same, too.
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Mikko

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No, the numbers are not the same for everyone.
Let's take the case of the Langevin traveler, Vo=0.8c. D=2*12al.

Richard, it seems to me that you're conflating two different
situations, which causes monumental confusion.  The case that
was under discussion was synchronizing two clocks at rest with
respect to each other, not the case where the clocks are in
relative motion, n'est-ce pas?

This means that, for an observer on Earth, the duration of the journey,
which is a number, will be To=D/Vo.
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Or To=24/0.8=30 years.
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Problem: this is not an invariant. Stella on board the rocket does not
have the same number as Terrence.
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She is 18 years old.
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The same is true here, in special relativity explained by Dr. Hachel,
which is fundamentally different from that taught by Minkowski.
Fundamentally different.
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If we believe in the flat earth theory (today it is the belief in flat
time and the absolute isochrony of the universe), we will say that for A
the outward journey is AB/c and the same for the return journey.
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And the same for B.
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But this way of thinking, even if it is intuitive, even if it seems of
the most colossal logic, is false.
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R.H.

Breath, blow, breath, blow.
 “Don’t think too much.  You’ll create a problem that wasn’t even
there in the first place.” – Anon.