Re: Langevin and Doppler effects...

Le 12/09/2024 à 16:00, "Paul.B.Andersen" a écrit :

 This is the statement I responded to.
 It was YOU who introduced Stella's view ("for Stella").
You even called it "the key to the paradox" and "the brilliant explanation".
If Stella shall return to Terrence, she _must_ accelerate during
her journey, so Stella's frame is always an accelerated frame of reference (in flat spacetime).
 But it isn't beautiful, even if it true.
 Stella's view is rather pointless.
 As I said:
Nothing happens to Terrence clock, it runs normally.
It is _only_ Stella's idea of what is simultaneous that
make it appear that Terrence clock run fast.
 If you change Stella's path in Terrence frame a little,
Stella's view of Terrence may change it a lot, because
Stella's idea of what is simultaneous changes.
(You can change the path without changing Stella's and Terrence's proper times.)
 If we describes the "twin paradox" in Terrence's inertial frame,
Stella's view adds nothing of interest.
 So we can do without Stella's view of Terrence.
It is certainly not "the key to the paradox".
 

--
Paul
According to physicists, the key to the paradox is to add a time gap, like adding dust under a carpet.
It's not pretty, and it's not true.
Physicists don't realize that they are practicing artificially.
The frame of reference that they attribute to Stella is firstly not the real one. It's not hers, but the frame of reference of a comoving observer placed very far away and observing things transversally.
This is the first problem, but the second will be worse. For the return, we are forced to do the same thing, but here, it's no longer like with Terrence where M1=M2.
In Stella's frame of reference, M1 is imaginarily infinitely far from M2. We "jump" from frame of reference, which is neither pretty nor credible. We then "jump" from clocks. And all this is nothing more than a vulgar patch-up to "be even more right".
If we finally wanted to understand things (but we don't want to),
we would realize that a frame of reference can only be attributed, in relativity, to a single observer.
This observer is at point O of the frame of reference.
In Stella's problem; Stella is NOT in her correct relativistic place, and we are forced to apply non-existent subterfuges (time-gap) to validate the passage from M1 (go) to M2 (return) while ideally these two points are infinitely far away in their respective space-time. We "jump" frames of reference.
I don't practice like that at all.
I always stay in Stella's frame of reference, WITH Stella as center and origin. So she NEVER jumps frames of reference. She is always in her frame of reference and at point O.
We then realize that there is never a clock jump to imagine.
Never. Terrence observes things with a clock that is smooth for him,
and fluid for her.
For her part, it is the same thing for Stella, she observes her own clock in a fluid way, and Terrence's in a fluid way.
I am repeating this because it is important, too bad if the reader finds that I am repeating myself.
Terrence (that is to say HIM and not M) observes this in his telescope and live.
It is Ta=0 (his watch) and Tb=0 (Stella's watch) at the start.
When Stella approaches her aphelion, her clock marks Tb=9 years.
Terrence's FOR Terrence marks 27 years!
Stella turns, and comes back. She reappears there, this time rushing towards the earth. Terrence always marks 27 years (+40 hours) and Stella always marks 9 years (+24 hours).
No time jump on Terrence's part, neither for him (that would be absurd), nor for her (that would also be absurd).
From Stella's point of view:
At the start Ta = 0 Tb = 0.
When she arrives there, just before starting her half-turn.
Her clock marks 9 years and she sees the terrestrial clock which marks 3 years. According to the laws of relativity.
When she has finished turning, she sees her watch always marks 9 years,
and Terrence's marks THREE YEARS.
I beg you to understand this.
There is NO time gap.
Stella's watch for Stella indicates 9 years and 24 hours. And Terrence's (seen by Stella in HER frame of reference) marks 3 years and 40 hours.
The paradox is therefore not explained by the time-gap.
We need to put an end to this patching up.
But then how is it explained?
Hold on tight my friends, breathe, blow. I'm going to tell you something
brilliant that you don't want to understand because of the finiteness of your neurons and even more because of your arrogance towards me.
Space is a mollusk of reference, and if we understand Poincaré's magnificent transformations, we realize that, for Stella when she turns, all her space will be transformed.
The earth which is at 4 ly (and not 7.2 ly) will be carried in its own frame of reference, centered on it, and not on M1 or M2, at 36 ly (and not at 7.2 ly).
We call this the relativistic zoom effect.
It is such an effect that is not understood, that is refused, and on which we spit.
Yet this is what is true, and our universe is wrong as I say it, and not as thousands of physicists who think they are stronger than me will say it.
Always, always, always, they will contradict, until the day when too much experimental evidence will go on my side.
The situation will become untenable for them.
And they will be obliged to make the effort to understand me by crying.
Because they will realize that if the concept is brilliant, the equations that follow are much simpler, and at the level of a good high school student, or even middle school student.
Hence my sadness when I read the forums or the relativistic websites.
No one makes the real effort to understand.
R.H. Ce message a été posté avec Nemo : <https://www.nemoweb.net/?DataID=zgxExgejF-Xu8AwQyyLOskMYAL0@jntp>