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Re: Light Slowing Down

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SolomonW wrote:

> On Tue, 06 Mar 2018 11:57:20 +0100, Thomas 'PointedEars' Lahn wrote:
>> […]
>> The assumption of local light speed constancy[¹] is not really debated in
>> science anymore (beyond crackpot circles) because all experiments in the
>> past 300+ years have confirmed it without a reasonable doubt.  And AISB
>> often, if it were fundamentally wrong, you would not be here: *beyond*
>> experiments, it turns out that local light speed constancy is essential
>> to processes in nature, and to how modern technology works.  Thus it is
>> accepted as scientific truth since *at least* 1983 (35 years ago).
>> 
>> See also the BIPM resolution on the metre definition of 1983, and the
>> recent discussions here about it, for details.
>> […]
>> ___________
>> ¹  As you can read in Davis & Lineweaver 2003: “The speed of photons
>>    relative to us (the slope of the light cone) is not constant, but is
>>    rather v_{rec} − c. Photons we receive that were emitted by objects
>>    beyond the Hubble sphere were initially receding from us (outward
>>    sloping lightcone at t ≲ 5 Gyr). Only when they passed from the
>>    region of superluminal recession v_{rec} > c (gray crosshatching)
>>    to the region of subluminal recession (no shading) can the photons
>>    approach us”.  [Speeds away from the observer have a positive
>>    sign, speeds towards the observer a negative sign, by convention.] 
> 
> Here are two papers, that argue otherwise

Otherwise than *what*, full-quoting idiot?
 
> http://www.worldscientific.com/doi/abs/10.1142/S0217732389002471

Of 1989.  Disproved by COBE, WMAP, Planck, etc.

> https://arxiv.org/abs/gr-qc/9211020

Of 1992/1998.  Also, it does say already in the abstract: “After the
critical time t_c, local Lorentz (and diffeomorphism) invariance is
restored and light travels at its presently measured speed.”

You really need to read beyond the title and the first sentence.


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

(from: WolframAlpha)

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Thread

Light Slowing Down Keith Stein <keithstein111@gmail.com> - 2018-03-04 16:31 +0000
  Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-04 18:08 +0100
    Re: Light Slowing Down SolomonW <SoloomonW@citi.com.au> - 2018-03-05 19:08 +1100
      Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-05 11:58 +0100
        Re: Light Slowing Down SolomonW <SolomonW@citi.com> - 2018-03-06 08:22 +1100
          Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-05 22:51 +0100
            Re: Light Slowing Down SolomonW <SolomonW@citi.com> - 2018-03-06 19:08 +1100
              Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-06 11:57 +0100
                Re: Light Slowing Down SolomonW <SolomonW@citi.com> - 2018-03-06 23:01 +1100
                Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-06 13:56 +0100
                Re: Light Slowing Down SolomonW <SoloomonW@citi.com.au> - 2018-03-07 13:54 +1100
                Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-07 06:57 +0100
                Re: Light Slowing Down SolomonW <SolomonW@citi.com> - 2018-03-07 17:19 +1100
      Re: Light Slowing Down Lofty Goat <rlwatkins@gmail.com> - 2018-03-11 12:52 -0500
        Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-12 02:24 +0100
  Re: Light Slowing Down SolomonW <SoloomonW@citi.com.au> - 2018-03-05 19:06 +1100
    Re: Light Slowing Down Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-03-05 12:39 +0100
      Re: Light Slowing Down mlwozniak@wp.pl - 2018-03-05 05:38 -0800
        Re: Light Slowing Down mitchrae3323@gmail.com - 2018-03-05 12:12 -0800
      Re: Light Slowing Down mitchrae3323@gmail.com - 2018-03-05 17:33 -0800
    Re: Light Slowing Down Keith Stein <keithstein111@gmail.com> - 2018-03-05 17:18 +0000
      Re: Light Slowing Down SolomonW <SolomonW@citi.com> - 2018-03-06 08:34 +1100
        Re: Light Slowing Down Keith Stein <keithstein111@gmail.com> - 2018-03-10 21:53 +0000
  Re: Light Slowing Down mitchrae3323@gmail.com - 2018-03-05 12:39 -0800
  Re: Light Slowing Down Keith Stein <keithstein111@gmail.com> - 2018-03-19 08:59 +0000

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