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Re: "The whole of physics is predicated on the constancy of the speed of light,"

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On 3/12/2018 8:59 pm, Keith Stein wrote:
> 
> 
>  > On 29/11/2018 10:28, Pentcho Valev wrote:
>  >> "If there's one thing every schoolboy knows about Einstein and his 
> theory of relativity, it is that the speed of light in vacuum is 
> constant. No matter what the circumstances, light in vacuum travels at 
> the same speed - a constant that physicists denote by the letter c: 
> 300,000 km per second, or as Americans refer to it, 186,000 miles per 
> second. The speed of light is the very keystone of physics, the 
> seemingly sure foundation upon which every modern cosmological theory is 
> built, the yardstick by which everything in the universe is measured. 
> [...] The only aspect of the universe that didn't change was the speed 
> of light. And ever since, the constancy of the speed of light has been 
> woven into the very fabric of physics, into the way physics equations 
> are written, even into the notation used. Nowadays, to "vary" the speed 
> of light is not even a swear word: It is simply not present in the 
> vocabulary of physics." 
> https://www.amazon.com/Faster-Than-Speed-Light-Speculation/dp/0738205257
> 
> On 29/11/2018 15:44, Keith Stein wrote:
> Searching for an alternative explanation of the Hubble Red Shifts, it 
> occurred to me that if the speed of light is slowing down, then this 
> will necessarily lead to increasing red-shift with increasing distance,
> as observed by Hubble et. al., without any expansion at all.
> 
> 
>  >> "The speaker Joao Magueijo, is a Reader in Theoretical Physics at 
> Imperial College, London and author of Faster Than the Speed of Light. 
> The Story of a Scientific Speculation. He opened by explaining how 
> Einstein's theory of relativity is the foundation of every other theory 
> in modern physics and that the assumption that the speed of light is 
> constant is the foundation of that theory. Thus a constant speed of 
> light is embedded in all of modern physics and to propose a varying 
> speed of light (VSL) is worse than swearing! It is like proposing a 
> language without vowels."  http://www.thegreatdebate.org.uk/VSLRevPrnt.html
>  >>
>  >> "The whole of physics is predicated on the constancy of the speed of 
> light," Joao Magueijo, a cosmologist at Imperial College London and 
> pioneer of the theory of variable light speed, told Motherboard. "So we 
> had to find ways to change the speed of light without wrecking the whole 
> thing too much." 
> https://motherboard.vice.com/en_us/article/8q87gk/light-speed-slowed
>  >
>  >
>  > Excellent post Pentcho.
>  >
>  >   The "Constancy of the Speed of Light".
>  > Only 'crackpots' doubt that eh!
>  >
>  > keith stein
> 
> 
> 
> Merely by assuming      dc = -K c dt ..................(1)
> I was led to             c = c(0) e^-Kt ...............(2)
> and on to               Red-Shift = e^-Kt - 1 .........(3)
> 
>      K ~= 10^-10 /year
>      t = time in years
> 
> Only after starting the PHYSICS PRIZE thread, in which i was trying to 
> enlist the help of sci.physics.relativity readers to obtain a more 
> accurate value of K, did the obvious solution occur to me...........
> 
>                         K = H = Hubble's Constant
> and                    t = -t  ( so times past become +ve)
> 
> which substituted in (3) gives:
> 
>              Red-Shift = e^Ht - 1 .........(4)
> 
> then for times which are small compared to 1/H (i.e. small compared
> to the 'age of the universe'), we may use the approximation:
>              e^x ~= 1 + x .................(5)
> 
> So for t << 1/H we have:
> 
>              Red-Shift = H * t ............(6)
> 
> which is of course the normal "Hubble's Law", valid only
> for modest times into the past ( t < ~5 billion years).
> 
> As our telescopes manage to see further out into space, and therefore 
> further back in time, we will find that the normal linear Hubble's Law 
> expressed in equation(6), will have to be replaced by the more accurate
> exponential form expressed in equation(4). This is indeed what is found
> in observatories all around the world eh!
> 
> Conclusions:
>      1. The speed of light in intergalactic-space is slowing down.
>      2. There was no "Big Bang"
>      3. There was no "Inflation"
>      4. The galaxies are not accelerating away from us.
>      5. There is no "Dark Energy"
> ********************************************************************
> 
> keith stein

You need a model of space-time to interpret the possible consequences of 
a changing speed of light. However, the model we have involves a 
constant speed of light.

You seem to be working with some other model, but you haven't stated 
what it is.

Sylvia.

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"The whole of physics is predicated on the constancy of the speed of light," Keith Stein <keithstein111@gmail.com> - 2018-12-03 09:59 +0000
  Re: "The whole of physics is predicated on the constancy of the speed of light," moroney@world.std.spaamtrap.com (Michael Moroney) - 2018-12-03 14:26 +0000
    Re: "The whole of physics is predicated on the constancy of the speed of light," Keith Stein <keithstein111@gmail.com> - 2018-12-03 15:14 +0000
      Re: "The whole of physics is predicated on the constancy of the speed of light," mitchrae3323@gmail.com - 2018-12-03 10:17 -0800
  Re: "The whole of physics is predicated on the constancy of the speed of light," JanPB <filmart@gmail.com> - 2018-12-03 13:32 -0800
  Re: "The whole of physics is predicated on the constancy of the speed of light," Sylvia Else <sylvia@email.invalid> - 2018-12-04 10:12 +1100
    Re: "The whole of physics is predicated on the constancy of the speed of light," Keith Stein <keithstein111@gmail.com> - 2018-12-05 15:05 +0000

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