Groups > sci.physics.relativity > #583957

Re: Annotated version of SRT

From	Thomas Heger <ttt_heg@web.de>
Newsgroups	sci.physics.relativity
Subject	Re: Annotated version of SRT
Date	2022-04-25 09:52 +0200
Message-ID	<jcn29aF5f6dU1@mid.individual.net> (permalink)
References	(19 earlier) <jchimgF3l9qU1@mid.individual.net> <t40a6a$17t7$1@gioia.aioe.org> <t40i8v$e99$1@gioia.aioe.org> <jck7oqFj9orU1@mid.individual.net> <b3816797-e144-415f-a0cc-210dfb533137n@googlegroups.com>

Show all headers | View raw

Am 24.04.2022 um 10:52 schrieb JanPB:

>> But even if so, x' would still be zero.
>
> Yes, you get  x' = 0  for the emitter/receiver because its location
> by construction of this experimental setup satisfies  x = vt  at
> all times  t,  hence the corresponding  x'  value is:
>
>      x' = x - vt = 0
>
> throughout.

Here you actually agree, that x'=0 must be true.


> You get confused by the multiple uses of  x'  (the standard notational
> abuse).  What Einstein does is he puts the emitter/receiver at  x' = 0
> and the mirror at some nonzero value of  x'  which he also calls  x'

'notational abuse' is in my world 'plain wrong'.

IOW: if a veriable is defined somehow, that definition remains valid, 
unless the veriable is redefined with a new meaning explicitly.

So: we are not allowed to declare something is just 'notational abuse'. 
Instead we have to use even the wrong definitions from the text, if 
there are any, because we must not change a text to our own liking.

A text is what it is, whether we like it or not.

> (notational abuse). Then he varies the location of the mirror and
> compares the resulting differences, this is what the differentiation
> with respect to  x'  that follows does.



No, Einstein wrote, that the ray was emitted from the zero spot of k. 
This is the moving system.

The zero spot of k has a coordinate in K, too, which is
xsi_0= x_0 + v*t

Since the emitter was located at a fixed point in k with cordinates in k 
xsi=0, eta=0,m zeta=0, the mirror cannot be place at the same spot.

Contrary to your assumption, we are forced to assume, that x' was the 
position of the MIRROR, even if Einstein had not written so.

There is actually no other possibility.



...


TH

Back to sci.physics.relativity | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-21 08:53 +0200
  Re: Annotated version of SRT Reinhardt Behm <rbehm@hushmail.com> - 2022-04-21 13:13 +0000
    Re: Annotated version of SRT Paul Alsing <pnalsing@gmail.com> - 2022-04-21 07:32 -0700
    Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-21 13:51 -0700
    Re: Annotated version of SRT nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-21 23:24 +0200
      Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-21 21:10 -0700
      Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-22 08:38 +0200
        Re: Annotated version of SRT nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-22 11:00 +0200
          Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-23 08:07 +0200
        Re: Annotated version of SRT RichD <r_delaney2001@yahoo.com> - 2022-04-23 14:59 -0700
          Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-24 07:36 +0200
          Re: Annotated version of SRT nospam@de-ster.demon.nl (J. J. Lodder) - 2022-04-24 10:41 +0200
            Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-24 01:59 -0700
            Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-26 09:02 +0200
  Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-21 13:48 -0700
    Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-22 09:00 +0200
      Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-22 01:41 -0700
        Re: Annotated version of SRT Dong Vassilikos <saox@cowrpsho.rb> - 2022-04-24 12:23 +0000
      Re: Annotated version of SRT Python <python@example.invalid> - 2022-04-22 15:39 +0200
        Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-22 07:11 -0700
        Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-23 07:55 +0200
          Re: Annotated version of SRT Michael Moroney <moroney@world.std.spaamtrap.com> - 2022-04-23 03:34 -0400
            Re: Annotated version of SRT Python <python@example.invalid> - 2022-04-23 11:52 +0200
              Re: Annotated version of SRT Maciej Wozniak <maluwozniak@gmail.com> - 2022-04-23 05:49 -0700
              Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-24 08:07 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-24 01:52 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-25 09:52 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-25 12:22 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-26 07:02 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-25 23:52 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-26 22:24 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-26 17:35 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-27 07:59 +0200
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-28 07:14 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-28 01:45 -0700
                Re: Annotated version of SRT Rady Konoe <akde@oakoradn.en> - 2022-04-28 09:03 +0000
                Re: Annotated version of SRT Odd Bodkin <bodkinodd@gmail.com> - 2022-04-28 16:44 +0000
            Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-24 07:49 +0200
              Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-24 01:23 -0700
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-24 11:08 +0200
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-24 05:14 -0700
                Re: Annotated version of SRT JanPB <filmart@gmail.com> - 2022-04-24 12:46 -0700
                Re: Annotated version of SRT Dong Vassilikos <saox@cowrpsho.rb> - 2022-04-24 21:09 +0000
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-25 10:23 +0200
                Re: Annotated version of SRT Michael Moroney <moroney@world.std.spaamtrap.com> - 2022-04-24 12:56 -0400
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-25 10:09 +0200
                Re: Annotated version of SRT Michael Moroney <moroney@world.std.spaamtrap.com> - 2022-04-25 11:51 -0400
                Re: Annotated version of SRT Thomas Heger <ttt_heg@web.de> - 2022-04-26 07:22 +0200
          Re: Annotated version of SRT Cody Sakellariou <yall@ckcldcdd.ar> - 2022-04-23 07:59 +0000
          Re: Annotated version of SRT Odd Bodkin <bodkinodd@gmail.com> - 2022-04-23 12:56 +0000
    Re: Annotated version of SRT Dong Vassilikos <saox@cowrpsho.rb> - 2022-04-24 21:21 +0000

csiph-web