Groups > sci.physics.relativity > #589546

Re: correct transversal Doppler shift

From	Thomas Heger <ttt_heg@web.de>
Newsgroups	sci.physics.relativity
Subject	Re: correct transversal Doppler shift
Date	2022-08-08 08:45 +0200
Message-ID	<jlbpnfFu971U2@mid.individual.net> (permalink)
References	(11 earlier) <jl6nf0F5qbpU1@mid.individual.net> <f11ae6bb-8cd2-4ae1-810a-6957b62c05e3n@googlegroups.com> <1309931a-ec95-4e87-a4e8-3971f6dbe950n@googlegroups.com> <jl9086FgoloU1@mid.individual.net> <86ac523c-6596-4423-ae56-23afad051532n@googlegroups.com>

Show all headers | View raw

>>> See at the simple configuration:
>>>
>>> ....A
>>> .../ v
>>> ./ 60 degs
>>> O---B----> v
>>>
>>> Two bodies A and B start to move from point O, and move with the same speed, for example v =.6c,
>>> and an angle between the both directions is 60 degs.
>>>
>>> What is Doppler measured between A to B?
>>> What is speed of A relative to B?
>>> What speed provides radar measurement?
>> 'Relativity' means 'relative to....'. Here the relation between A and B
>> is important.
>>
>> In your example A moves relative to B, because the points move along
>> lines in an angle.
>>
>> The 60° angle would make the geometric relations easy, because the
>> points 0, A and B form a triangle with all angles having 60°.
>>
>> Therefore the relative velocity between A and B should also be 0.6*c.
>>> Where A is visible by B - what angle and speed?
>> The angle between A and B is zero, because for A the only visible point
>> is B.
>>
>> The point 0 is not visible, hence the only possible reference is
>> actually B and therefor the angle between B and line of sight is zero.
>>> We see: the speed A wrt B is just: 0.6c, because there is an equiangular triangle: 0.6 - 0.6 - 0.6
>> Sure..
>>
>> But what was still your question?
>
> My question is:
> - what speed, A wrt B, provides SR?
> - what is measured Doppler here - from A to B?
>
> And finally:
> why SR provides v_AB <> 0.6c,
> and what is purpose of that velocity - where is the sense of that quantity?

As I'm not particularily a fan of SRT, I cannot help you here.

You should ask one of the SRT-fans like e.g. Tom Roberts.


TH

Thread

correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-09 04:47 -0700
  Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-07-10 09:05 +0200
    Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-07-11 09:21 +0200
      Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-02 08:52 +0200
        Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-02 00:29 -0700
          Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-03 09:08 +0200
            Re: correct transversal Doppler shift Volney <volney@invalid.invalid> - 2022-08-03 04:33 -0400
              Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-04 08:01 +0200
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-04 00:05 -0700
                Re: correct transversal Doppler shift Maciej Wozniak <maluwozniak@gmail.com> - 2022-08-04 00:11 -0700
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-04 07:37 -0700
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-04 08:04 -0700
                Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-08-04 15:16 +0000
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-04 08:21 -0700
                Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-08-04 15:27 +0000
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-04 08:59 -0700
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-04 09:12 -0700
                Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-05 07:08 +0200
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-05 03:29 -0700
                Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-06 10:35 +0200
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-06 02:03 -0700
                Re: correct transversal Doppler shift Maciej Wozniak <maluwozniak@gmail.com> - 2022-08-06 02:26 -0700
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-06 06:06 -0700
                Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-07 07:18 +0200
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-07 03:27 -0700
                Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-08 08:45 +0200
                Re: correct transversal Doppler shift "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-08-08 08:51 -0700
                Re: correct transversal Doppler shift Diego Traversa <toed@iavdattg.ev> - 2022-08-08 22:35 +0000
                Re: correct transversal Doppler shift "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-08-08 21:01 -0700
                Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-05 03:33 -0700
                Re: correct transversal Doppler shift "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2022-08-05 21:10 -0700
            Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-03 09:59 -0700
            Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-08-03 10:12 -0700
  Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-10 06:43 -0700
    Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-10 16:34 +0000
  Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-13 11:02 -0500
    Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-13 09:28 -0700
      Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-13 09:36 -0700
      Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-13 18:55 +0000
      Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-18 20:55 -0500
        Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-19 08:13 -0700
          Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-20 11:28 -0500
            Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-20 12:03 -0700
            Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-20 13:04 -0700
              Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-21 21:19 -0500
                Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-22 07:28 -0700
                Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-22 12:11 -0500
                Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-22 17:19 +0000
          Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-22 22:44 +0000
            Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-23 04:46 -0700
              Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-23 04:59 -0700
                Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-23 14:34 +0000
              Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-23 12:20 +0000
      Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-07-29 21:27 -0700
        Re: correct transversal Doppler shift Prokaryotic Capase Homolog <prokaryotic.caspase.homolog@gmail.com> - 2022-07-29 21:59 -0700
        Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-30 11:26 +0000
        Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-07-30 05:34 -0700
    Re: correct transversal Doppler shift Richard Hachel <r.hachel@tiscali.fr> - 2022-07-13 18:51 +0000
      Re: correct transversal Doppler shift Tom Roberts <tjroberts137@sbcglobal.net> - 2022-07-20 12:12 -0500
  Re: correct transversal Doppler shift "mitchr...@gmail.com" <mitchrae3323@gmail.com> - 2022-08-04 16:06 -0700
    Re: correct transversal Doppler shift Duan Bonomo <ddfs@dtszpmat.zy> - 2022-08-06 16:15 +0000
      Re: correct transversal Doppler shift Alsor <alsorgzl@gmail.com> - 2022-08-06 11:25 -0700
        Re: correct transversal Doppler shift Thomas Heger <ttt_heg@web.de> - 2022-08-07 07:25 +0200
  Re: correct transversal Doppler shift "erkd...@gmail.com" <erkdemon@gmail.com> - 2022-08-06 22:11 -0700

csiph-web