sci.physics.particle

On Mar 18, 7:29=A0pm, Tom Roberts wrote in
sci.physics.relativity:
> John C. Polasek wrote:
> > On Sun, 16 Mar 2008 17:14:22 GMT,TomRoberts
> > wrote:
> >> =A0 =A0 =A0 =A0[Ignore Valev when he brings up Pound-Rebka and similar
> >> =A0 =A0 =A0 =A0 experiments -- they do not measure speed.]
> > I think, in a very important way, the experiment did effectively
> > measure light speed, even though the authors thought frequency was
> > reduced on the way up ("On the Weight of Photons" iirc).
> > The Mossbauer filter on a speaker cone was oscillated at a minute
> > rate, and spectral re-centering was achieved by the Doppler effect. On
> > the up-stroke, the velocity neutralized the speedup of light as it
> > left the gravity well.
>
> Think about it -- there is no time synchornization, and if the effect
> were due to a change in speed there's no way for the apparatus to be
> sensitive to it; that is, there's no "nominal distance" relative to
> which a "speed change" could be measured. Their observations are
> consistent with a change in frequency (measured via Doppler), and say
> nothing at all about any change in speed. Whether or not the speed
> changed in addition to the frequency cannot be answered by this
> particular experiment.

I would agree with you Roberts Roberts if at this place you did not
always stick your head in the sand, expose other parts of your body
and fail to explain clearly the two incompatible implications of Pound-
Rebka result f'=3Df(1+V/c^2). Let me do this for you:

The Pound-Rebka result f'=3Df(1+V/c^2) implies that:

(1) the speed of light in a gravitational filed is VARIABLE as
Einstein suggests in his 1920 "Relativity" and obeys Einstein's 1911
equation c'=3Dc(1+V/c^2), whereas the wavelength remains constant. The
application of Einstein's equivalence principle converts c'=3Dc(1+V/c^2)
into c'=3Dc+v, an equation given by Newton's emission theory of light,
where v is the relative speed of the light source and the observer in
the absence of a gravitational field. Einstein's 1905 light postulate
(c'=3Dc) is false.

(2) the speed of light in a gravitational field is CONSTANT and obeys
the equation c'=3Dc, in contradiction to what Einstein claims in his
1920 "Relativity". The wavelength is variable and obeys the equation
L'=3DL/(1+V/c^2). The application of Einstein's equivalence principle
leads to the conclusion that the equation c'=3Dc+v given by Newton's
emission theory of light is wrong whereas Einstein's 1905 light
postulate (c'=3Dc) is correct.

This is a minimum explanation Roberts Roberts - more could be said in
favour of (1) and against (2).

Pentcho Valev
pvalev@yahoo.com