On Jul 24, 9:31 am, Pentcho Valev <pva...@yahoo.com> wrote:

Einstein offered two equations showing how the speed of photons moving
radially with respect to a spherical mass varies with the
gravitational potential V:

(A) c' = c(1 + V/c^2)

(B) c' = c(1 + 2V/c^2)

( see http://www.mathpages.com/rr/s6-01/6-01.htm )

Equation A is consistent with the Pound-Rebka experiment and also
(through the application of Einstein's equivalence principle) with the
equation c'=c+v given by Newton's emission theory of light (v is the
speed of the light source relative to the observer). It is not clear
what equation B is consistent with.

Equation A has a simple derivation. The gravitational frequency shift
confirmed experimentally by Pound and Rebka is:

f' = f(1+V/c^2)

This should be combined with the textbook formula:

f' = c'/L'  ;  f = c/L

where L is the wavelength. So we obtain:

c' = c(1+V/c^2) ; L' = L   (Einstein 1911)

or:

c' = c ; L' = L/(1+V/c^2)   (anti-Einstein 1911)

Einstein 1911 is reasonable but fatal for Divine Albert's Divine
Theory. Anti-Einstein 1911 is absurd but it is the only salvation.

Pentcho Valev
pvalev@yahoo.com