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Groups > sci.physics.relativity > #469998

Re: URGENT - Currently APPROACHING at speed "c"

From Brandi Hofmann <ohifu@awdwf.nr>
Newsgroups sci.physics.relativity
Subject Re: URGENT - Currently APPROACHING at speed "c"
Date 2018-08-31 11:55 +0000
Organization Aioe.org NNTP Server
Message-ID <pmbabn$1g43$1@gioia.aioe.org> (permalink)
References <tvihD.147003$iK2.101979@fx08.am4> <cbOdnWuVHoGwxhXGnZ2dnUU7_83NnZ2d@giganews.com>

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Tom Roberts wrote:

> Note that sound will not propagate in a gas if the mean free path of
> its molecules is larger than the wavelength of the sound wave. There is
> no such limitation on light: visible light (wavelength ~ 0.5 micron)
> travels quite well through the intergalactic medium (mean free path ~
> meters).

That's because EM does not require a medium to propagate. Forces (sound),  
yes, but not EM itself. Sound is nothing but oscillating pressure. 
Meanwhile they are not measuring the speed of light anymore.

1907 Rosa and Dorsey, EM constants		299710±30
1926 Albert A. Michelson, rotating mirror	299796±4
1950 Essen and Gordon-Smith, cavity resonator	299792.5±3.0
1958 K.D. Froome, radio interferometry		299792.50±0.10
1972 Evenson et al., laser interferometry	299792.4562±0.0011

1983 	17th CGPM, definition of the metre	299792.458 (exact) ??

very funny indeed.

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Thread

URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-28 21:45 +0100
  Re: URGENT - Currently APPROACHING at speed "c" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-08-28 14:01 -0700
  Re:URGENT - Currently APPROACHING at speed "c" Libor Striz <poutnik4REMOVEnntp@CAPITALSgmail.com> - 2018-08-28 23:55 +0200
    Re: URGENT - Currently APPROACHING at speed "c" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-08-28 15:08 -0700
      Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-30 19:39 +0100
        Re: URGENT - Currently APPROACHING at speed "c" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-08-30 12:55 -0700
          Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-31 10:46 +0100
        Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-08-31 09:59 -0700
          Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-31 18:13 +0100
            Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-08-31 14:25 -0700
              Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-01 09:14 +0100
    Re:URGENT - Currently APPROACHING at speed "c" Brandi Hofmann <ohifu@awdwf.nr> - 2018-08-29 15:54 +0000
      Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-08-31 06:31 -0700
        Re: URGENT - Currently APPROACHING at speed "c" Fattore Nzavecchia <avcir@valecw.ba> - 2018-08-31 16:15 +0000
  Re: URGENT - Currently APPROACHING at speed "c" Tom Roberts <tjroberts137@sbcglobal.net> - 2018-08-30 16:01 -0500
    Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-31 00:08 +0100
      Re: URGENT - Currently APPROACHING at speed "c" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-08-30 16:29 -0700
      Re: URGENT - Currently APPROACHING at speed "c" Tom Roberts <tjroberts137@sbcglobal.net> - 2018-08-31 11:10 -0500
        Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-08-31 19:28 +0100
          Re: URGENT - Currently APPROACHING at speed "c" Odd Bodkin <bodkinodd@gmail.com> - 2018-08-31 18:49 +0000
            Re: URGENT - Currently APPROACHING at speed "c" Dirk Van de moortel <dirkvandemoortel@notmail.com> - 2018-09-01 00:41 +0200
            Re: URGENT - Currently APPROACHING at speed "c" mitchrae3323@gmail.com - 2018-08-31 16:29 -0700
          Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-08-31 12:37 -0700
            Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-08-31 14:37 -0700
          Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-08-31 14:36 -0700
            Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-01 13:34 +0100
              Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-09-01 06:18 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-01 15:38 +0100
                Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-09-01 08:17 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-01 16:50 +0100
                Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-09-01 09:57 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-01 20:17 +0200
                Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-01 22:23 +0100
                Re: URGENT - Currently APPROACHING at speed "c" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-02 02:13 +0200
                Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-02 08:07 +0100
                Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-09-02 04:06 -0700
                Re: URGENT - Currently APPROACHING at speed "c" mlwozniak@wp.pl - 2018-09-02 04:29 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Gary Harnagel <hitlong@yahoo.com> - 2018-09-02 04:46 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-02 15:10 +0200
                Re: URGENT - Currently APPROACHING at speed "c" Jeanclaude Erald <urdu@iuoienv.vu> - 2018-09-02 13:13 +0000
                Re: URGENT - Currently APPROACHING at speed "c" mlwozniak@wp.pl - 2018-09-02 06:57 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Odd Bodkin <bodkinodd@gmail.com> - 2018-09-02 13:37 +0000
                Re: URGENT - Currently APPROACHING at speed "c" Keith Stein <keithstein111@gmail.com> - 2018-09-02 17:55 +0100
                Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-09-02 21:06 -0700
                Re: URGENT - Currently APPROACHING at speed "c" mlwozniak@wp.pl - 2018-09-01 15:06 -0700
                Re: URGENT - Currently APPROACHING at speed "c" "Ross A. Finlayson" <ross.finlayson@gmail.com> - 2018-09-01 15:11 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-09-02 02:44 +0200
                Re: URGENT - Currently APPROACHING at speed "c" mlwozniak@wp.pl - 2018-09-01 21:53 -0700
                Re: URGENT - Currently APPROACHING at speed "c" Edward Prochak <edprochak@gmail.com> - 2018-09-02 21:11 -0700
                Re: URGENT - Currently APPROACHING at speed "c" mlwozniak@wp.pl - 2018-09-03 03:11 -0700
                Re: URGENT - Currently APPROACHING at speed "c" mskeon@optusnet.com.au - 2018-09-02 22:59 -0700
    Re: URGENT - Currently APPROACHING at speed "c" Brandi Hofmann <ohifu@awdwf.nr> - 2018-08-31 11:55 +0000
      Re: URGENT - Currently APPROACHING at speed "c" Unaga Kinomoto <unh@oawhhi.jp> - 2018-09-02 18:37 +0000

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