Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > sci.physics > #679712

Re: The Speeed of Light

Cross-posted to 4 groups.

Followups directed to: sci.physics.relativity

Show all headers | View raw

    [Next time, please set Followup-To when crossposting.]

Tom Roberts wrote:

> There are two quite different meanings of the symbol "c" [#], which have
> confused you (and myriad other newbies and wannabes).
> 
>    * c(1) is the speed that appears in the Lorentz transform.
> 
>    * c(2) is the vacuum speed of light.
> 
> Note that c(1) is the limiting speed for timelike (massive) objects, not
> c(2) as you seem to think. c(1) is locally invariant, and is the only
> speed at which massless objects can travel.
> 
> At present, to the best of our knowledge c(1) = c(2); […]

Count me as one of the “newbies” then.  This discussion brings me back to
my earlier question, which you had answered in an evasive, unsatisfactory 
way back then.  So I ask again:

Do you mean that, for example,

  t' = γ (t − v∕c² x)

would have to be written precisely

  t' = γ (t − v∕c₀² x)

*regardless* of the medium in which the relative motion occurs?

A simple “yes” or “no” will suffice for now.  TIA.


PointedEars
-- 
Q: What happens when electrons lose their energy?  
A: They get Bohr'ed.

(from: WolframAlpha)

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

Thread

The Speeed of Light The Starmaker <starmaker@ix.netcom.com> - 2018-04-02 13:58 -0700
  Re: The Speeed of Light Siri Cruise <chine.bleu@yahoo.com> - 2018-04-02 16:15 -0700
  Re: The Speeed of Light SolomonW <SolomonW@citi.com> - 2018-04-03 09:46 +1000
  Re: The Speeed of Light Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-02 22:32 -0500
    Re: The Speeed of Light Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-03 07:31 +0200
  Re: The Speeed of Light Alan Folmsbee <omnilobe@gmail.com> - 2018-04-02 22:44 -0700
  Re: The Speeed of Light casagiannoni@optonline.net - 2018-04-04 14:23 -0400
  Re: The Speeed of Light Keith Stein <keithstein111@gmail.com> - 2018-04-08 20:02 +0100
    Re: The Speeed of Light Libor 'Poutnik' Stříž <poutnik@privacy.net> - 2018-04-08 22:03 +0200
      Re: The Speeed of Light Lofty Goat <rlwatkins@gmail.com> - 2018-05-05 22:16 -0500
    Re: The Speeed of Light Edward Prochak <edprochak@gmail.com> - 2018-04-08 18:10 -0700
    Re: The Speeed of Light Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-09 09:39 -0500
      Re: The Speeed of Light Keith Stein <keithstein111@gmail.com> - 2018-04-09 16:04 +0100
        Re: The Speeed of Light Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-09 18:16 +0200
          GPS satellites. Jeff-Relf.Me  @. - 2018-04-09 10:45 -0700
            Re: GPS satellites. "reber G=emc^2" <herbertglazier0@gmail.com> - 2018-04-09 11:33 -0700
              Re: GPS satellites. "hanson" <hanson@quick.net> - 2018-04-09 12:34 -0700
            Re: GPS satellites. J. Clarke <jclarke.873638@gmail.com> - 2018-04-09 23:28 -0400
              GPS satellites. Jeff-Relf.Me  @. - 2018-04-09 20:49 -0700
              Re: GPS satellites. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-10 06:00 +0200
              Re: GPS satellites. Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-11 14:36 -0500
                Re: GPS satellites. J. Clarke <jclarke.873638@gmail.com> - 2018-04-11 22:22 -0400
                Re: GPS satellites. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-12 04:38 +0200
        Re: The Speeed of Light Edward Prochak <edprochak@gmail.com> - 2018-04-09 09:51 -0700
        Re: The Speeed of Light Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-09 14:00 -0500
        Re: The Speeed of Light Odd Bodkin <bodkinodd@gmail.com> - 2018-04-09 19:34 +0000
        Re: The Speeed of Light Lofty Goat <rlwatkins@gmail.com> - 2018-04-09 21:10 -0500
          Re: The Speeed of Light Keith Stein <keithstein111@gmail.com> - 2018-04-10 17:56 +0100
            Re: The Speeed of Light Odd Bodkin <bodkinodd@gmail.com> - 2018-04-10 18:39 +0000
            Re: The Speeed of Light Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-10 20:40 +0200
            Re: The Speeed of Light Lofty Goat <rlwatkins@gmail.com> - 2018-04-10 14:23 -0500
              LET EXPERIMENT DECIDE ('cos i think Relativists are Charlatans eh!) Keith Stein <keithstein111@gmail.com> - 2018-04-10 21:28 +0100
            Re: The Speeed of Light Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-14 09:11 -0500
              Re: The Speeed of Light Keith Stein <keithstein111@gmail.com> - 2018-04-14 18:44 +0100
      Re: The Speeed of Light Whisper <beaver999@ozemail.com> - 2018-04-10 20:43 +1000
        Speed of light (was: The Speeed of Light) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-12 06:25 +0200
    Re: The Speeed of Light Edward Prochak <edprochak@gmail.com> - 2018-04-11 09:58 -0700
  Re: The Speeed of Light casagiannoni@optonline.net - 2018-04-08 19:51 -0400
    Re: The Speeed of Light Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-09 06:43 +0200
      Re: The Speeed of Light Paul Colquhoun <newsposter@andor.dropbear.id.au> - 2018-04-09 16:52 +1000
        Re: The Speeed of Light Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-04-09 09:23 +0200

csiph-web