Speed of light (from redshifted galaxies)

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1) Are there any experiments/measurements of speed of light from distant (redshifted) galaxies?
2) Are there any experiments/measurements of luminosity distance of bodies moving away relative to us?
3) Where can I find type 1A supernova data (redshift and luminosity distance) for low z measurements, and high z.
So far i found few docs in arxiv: "NEW HUBBLE SPACE TELESCOPE DISCOVERIES OF TYPE Ia SUPERNOVAE AT z>=1:"
and "Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant"
About 50 type 1A supernovas. Is there more recent and complete list?
 

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  • #2
phinds
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1) Are there any experiments/measurements of speed of light from distant (redshifted) galaxies?
Do you doubt that the speed of light from distant galaxies is c ?
 
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Well, I'm not rejecting any possibility. Experimental verification would clear my doubts. Some theoretical physicists are arguing about that.
 
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phinds
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Well, I'm not rejecting any possibility. Experimental verification would clear my doubts. Some theoretical physicists are arguing about that.
Can you provide a reference for any physicists who doubt that light in a vacuum travels at c ?
 
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http://arxiv.org/pdf/physics/0406104.pdf
http://arxiv.org/pdf/astro-ph/0101455v2.pdf
http://arxiv.org/pdf/0908.1539v1.pdf

I think we might split the problem into two: c changing over time, and c changing over distance.

Also, question 2) bothers me the most:
2) Are there any experiments/measurements of luminosity distance of bodies moving away relative to us?
Only one of the three authors of those papers is in a physics department ( U. of Hull, UK). I get the impression that none of them undertstand or have any regard for GR and are looking for explanations that are not needed or plausible.

Questions about the speed of light over large distances cannot be studied whilst ignoring effects of curved spacetime.
 

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