Timeline for Does the accelerated rate of expansion of the Universe have any effect on the speed of light in vacuum?
Current License: CC BY-SA 3.0
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Aug 18, 2015 at 19:09 | comment | added | Kyle Kanos | See Baez for more... As noted elsewhere by me, the author of that article is Don Koks, not Baez. It is both intentionally misleading & ethically wrong for you to attribute that quote to Baez. | |
Aug 8, 2015 at 7:13 | comment | added | John Duffield | @Kyle Oman : it isn't misleading. What is, is forgetting about in the infinitesimal and claiming that the speed of light is constant everywhere. See Shapiro: "the speed of a light wave depends on the strength of the gravitational potential along its path". It isn't constant in the room you're in, read that Baez article. Your local measurement of c is only constant because of the tautology wherein the local motion of light defines your second and your metre. | |
Aug 7, 2015 at 16:37 | comment | added | Kyle Oman | You keep going on about those Einstein papers, yet the very same page you cite for Einstein saying the speed of light is variable goes on to clarify with EXACTLY THE POINT OF VIEW YOU DERISIVELY CALL POPSCI. "[...] this very fact shows that in the vicinity of every world point the results of the theory of special relativity are valid (in the infinitesimal) for a suitably chosen local coordinate system." The standard physics is that the SR holds locally ($c$ is constant), and any measurement of $c$ must be local to be valid. Your explanation isn't wrong, but it is confusing and misleading. | |
Aug 7, 2015 at 16:20 | history | answered | John Duffield | CC BY-SA 3.0 |