http://www.einstein-online.info/spot...t_white_dwarfs
Albert Einstein Institute: "One of the three classical tests for general relativity is the gravitational redshift of light or other forms of electromagnetic radiation. However, in contrast to the other two tests - the gravitational deflection of light and the relativistic perihelion shift -, you do not need general relativity to derive the correct prediction for the gravitational redshift. A combination of Newtonian gravity, a particle theory of light, and the weak equivalence principle (gravitating mass equals inertial mass) suffices. (...) The gravitational redshift was first measured on earth in 1960-65 by Pound, Rebka, and Snider at Harvard University..."

That is, the Pound-Rebka experiment is compatible with the prediction of Newton's emission theory of light that, in a gravitational field, the speed of falling photons varies like the speed of ordinary falling objects. If the top of a tower of height h emits photons, an observer on the ground will measure their speed to be:

c' = c(1 + gh/c^2) (according to the emission theory)

and their frequency to be:

f' = f(1 + gh/c^2) (confirmed by Pound and Rebka)

where c and f are the initial speed and frequency (as measured by the emitter).

Accordingly, the Pound-Rebka experiment is incompatible with the prediction of Einstein's general relativity that, in a gravitational field, the speed of falling photons varies twice as fast as the speed of ordinary falling objects:

c' = c(1 + 2gh/c^2)

The factor 2 on the potential term makes this prediction incompatible with the frequency shift measured in the Pound-Rebka experiment.

Conclusion: Actually the Pound-Rebka experiment confirmed Newton's emission theory of light and refuted Einstein's relativity.

Pentcho Valev