🚀 go-pugleaf

On Feb 25, 5:33 pm, Pentcho Valev <pva...@yahoo.com> wrote:
> http://groups.google.com/group/sci.physics.research/msg/c7eddf24b59b0840
> Steve Carlip: "In special relativity, the speed of light is constant
> when measured in any *inertial* frame.  In general relativity, the
> appropriate generalization is that the speed of light is constant in
> any freely falling reference frame (in a region small enough that
> tidal effects can be neglected). In this passage, Einstein is not
> talking about a freely falling frame, but rather about a frame at rest
> relative to a source of gravity.  In such a frame, the speed of light
> can differ from c, basically because of the effect of gravity
> (spacetime curvature) on clocks and rulers."
>
> Honest Carlip, is the gravitational frequency shift, e.g. that
> measured by Pound and Rebka, caused by the fact that "the speed of
> light can differ from c"? Your sillier brothers teach the
> gravitational frequency shift is consistent with variable wavelength
> while the speed of light remains constant, in accordance with the
> formula:
>
> frequency = (speed of light)/(wavelength)
>
> Why don't you teach your sillier brothers, Honest Carlip? Is this
> ambiguity the fundamental task of Einsteiniana?

Brother Paul Davies wants to confuse you, Honest Carlip, but you will
not be taken in, will you:

http://www.guardian.co.uk/science/2004/apr/10/spaceexploration.comment
Paul Davies: "Then, in 1960, the third test was finally conducted with
reasonable accuracy. Physicists at Harvard University measured a small
shift in the frequency of gamma rays directed vertically up a tower,
confirming that gravity slows time."

Pentcho Valev
pvalev@yahoo.com