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Re: Light Slowing Down

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SolomonW wrote:
^^^^^^^^
It is considered polite here to post under one’s real name.

> On Mon, 05 Mar 2018 22:51:17 +0100, Thomas 'PointedEars' Lahn wrote:
>> SolomonW wrote:
>>> On Mon, 05 Mar 2018 11:58:43 +0100, Thomas 'PointedEars' Lahn wrote:
>>>> SolomonW wrote:
>>>>> On Sun, 04 Mar 2018 18:08:28 +0100, Thomas 'PointedEars' Lahn wrote:
>>>>>>|  6. 5 points for using a thought experiment that contradicts the
>>>>>>|  results
>>>>>>|     of a widely accepted real experiment.
>>>>> Please which experiment is this?
>>>> I don’t know, how about *all*?
>>>> 
>>>> <https://www.nobelprize.org/nobel_prizes/physics/laureates/2011/>
>>> 
>>> What a shame I was hoping for a paper showing such an
>>> experiment.Something real.
>> 
>> You *really* need to learn how to *read*.  Details of the research can be
>> found under “Advanced Information”, also information about this is all
>> over the Net.
>> 
>> On the other hand, Bayes’ theorem suggests that it is unlikely that you
>> would understand the paper, and if surprisingly you did to some extent,
>> that it is probable that you would deny its findings anyway.
>> 
>> So, what’s the point?
> 
> Here is the advanced section
> 
> https://www.nobelprize.org/nobel_prizes/physics/laureates/2011/advanced-physicsprize2011.pdf
> 
> Now where is the proof that C is a constant?

Ah, *that* is your problem?

    [Sadly, you are still not paying attention.

     The symbol used for the speed of light nowadays is a *lowercase* “c”.
     The capital “C” is the symbol for the unit of the charge, the coulomb,
     instead.

     You are still looking for proof in the natural sciences, but you will
     only be able to find *confirmation* of *models* proposed by 
     *theories*.]

If you are looking for direct confirmation, you will have to look elsewhere.  
You see, the work is a *scientific* one, so its conclusions are based on the 
assumption of local light speed constancy¹.  It is *implied*, as you can see 
in phrases like

  · “6 billion light years”;
  · “we have set the velocity of light to unity (c = 1)”;
  · “It is straightforward to measure the wavelength of light
    (e.g. from a given atomic spectral line) that a distant object emits”;
  · “a distance of 160 000 light years”;
  · “The very successful Standard Model for Particle Physics”;
  · “relativistic quantum physics”, and
  · “the velocity of light, c”.

The assumption of local light speed constancy 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.


HTH

PointedEars
___________
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.]
-- 
Q: Why is electricity so dangerous?  
A: It doesn't conduct itself.

(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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