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Re: Invariance of the speed of light

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On Sunday, February 6, 2022 at 2:12:43 PM UTC-8, Ross A. Finlayson wrote:
> On Sunday, February 6, 2022 at 6:47:36 AM UTC-8, Richard Hachel wrote: 
> > Invariance of the speed of light. 
> > 
> > The speed of light is invariant by change of frame. 
> > 
> > This is something that has been difficult to teach. 
> > 
> > But the ordeal is not over. Ol must also teach that it is for all 
> > repositories, including accelerated repositories. 
> > 
> > And there, it's no pie. 
> > 
> > However, it is obvious that if I move at accelerated speed towards a wagon 
> > where a ray of light falls, this ray is observed only in relation to an 
> > infinitesimal succession of Galilean reference frames. 
> > 
> > The speed of light will always be the same. 
> > 
> > The spoke will take on the appearance of a curve. But on this curve the 
> > speed of light will be constant and equal to c. 
> > 
> > Another thing: all the repositories are fixed for themselves. This is true 
> > for Galilean repositories, but it is also true for accelerated 
> > repositories. A falling body does not move relative to itself. For him, it 
> > is the earth that approaches him at accelerated speed. 
> > 
> > This idea is very useful to understand what happens when describing the 
> > traveler of Tau Ceti. 
> > 
> > The rocket is fixed, its propulsion acts as if propelling the surrounding 
> > space at accelerated speed. 
> > 
> > Hence the extraordinary simplicity of calculation that can be done (in two 
> > lines) when we have understood all that and we see the error of 
> > relativistic physicists when they deal with the proper time of this 
> > rocket. 
> > 
> > We then understand (and it makes us laugh so much we feel stupid not to 
> > have thought of it) why the time of the rocket between the moment it takes 
> > off and the moment when the Tau Teri system joins it, is same, absolutely 
> > of the same value as the instant when another rocket would take off (but 
> > at adequate average speed) and the instant when the Tau Ceti system would 
> > join it. 
> > 
> > The departure of the two rockets being simultaneous, the arrival of the 
> > two rockets being simultaneous. 
> > 
> > Whatever happens between the two, since neither, in its frame of 
> > reference, has moved, and joint events (they leave the earth together and 
> > Tau Ceri joins them when they are together) undoubtedly remain joint. 
> > The proper times of the two rockets will therefore be the same in both 
> > cases. 
> > It is therefore sufficient to know the proper time of one of the rockets 
> > to have the proper time of the other. It will be the same. 
> > 
> > 
> > T.H.
> Sagnac / Ehrenfest. 
> 
> 1/2 c wheel + 1/2 c wheel = 1 c wheel

Pezzaglia's usually reliable.

http://www.clifford.org/wpezzag/talk/2005eugene/05eugene.pdf

Not to mention authoritative.

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Invariance of the speed of light Richard Hachel <r.hachel@tiscali.fr> - 2022-02-06 14:47 +0000
  Re: Invariance of the speed of light Maciej Wozniak <maluwozniak@gmail.com> - 2022-02-06 08:05 -0800
  Re: Invariance of the speed of light whodat <whodaat@void.nowgre.com> - 2022-02-06 12:33 -0600
    Problem Richard Hachel <r.hachel@tiscali.fr> - 2022-02-06 18:59 +0000
      Re: Problem The Starmaker <starmaker@ix.netcom.com> - 2022-02-06 12:22 -0800
        Re: Problem Richard Hachel <r.hachel@tiscali.fr> - 2022-02-06 20:35 +0000
      Re: Problem FromTheRafters <erratic@nomail.afraid.org> - 2022-02-06 16:10 -0500
      Re: Problem The Starmaker <starmaker@ix.netcom.com> - 2022-02-06 21:01 -0800
        Re: Problem The Starmaker <starmaker@ix.netcom.com> - 2022-02-06 21:02 -0800
  Re: Invariance of the speed of light "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-02-06 14:12 -0800
    Re: Invariance of the speed of light "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-02-06 16:35 -0800
  Re: Invariance of the speed of light Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-02-07 06:23 +0100
    Re: Invariance of the speed of light Richard Hachel <r.hachel@tiscali.fr> - 2022-02-07 15:14 +0000
      Re: Invariance of the speed of light Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2022-02-13 19:14 +0100
        Re: Invariance of the speed of light Darrel Angus <argus@iiehdc.mx> - 2022-02-14 07:11 +0000
  Re: Invariance of the speed of light Richard Hertz <hertz778@gmail.com> - 2022-02-13 23:54 -0800
  Re: Invariance of the speed of light Sylvia Else <sylvia@email.invalid> - 2022-02-14 21:51 +1100

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