🚀 go-pugleaf

On May 22, 7:43 pm, Tom Roberts <tjroberts...@sbcglobal.net> wrote in
sci.physics.relativity:
> Albertito wrote:
> > [...]
>
> If you had bothered to STUDY this, you would know that there are
> numerous experiments that refute Newtonian gravity. So Newtonian gravity
> cannot be "correct" (in that it accurately reflects the world we
> inhabit). These experiments do not refute GR, or some other models of
> gravity....

The gravitational redshift factor 1+phi/c^2 experimentally confirmed
by Pound and Rebka is consistent with:

(A) Einstein's 1911 equation c'=c(1+phi/c^2) given by Newton's
emission theory of light?

(B) Einstein's 1915 (or 1955) equation c'=c(1+2phi/c^2) given by
general relativity?

http://www.speed-light.info/speed_of_light_variable.htm
"Einstein wrote this paper in 1911 in German (download from:
http://www.physik.uni-augsburg.de/annalen/history/einstein-papers/1911_35_898-908.pdf).
It predated the full formal development of general relativity by about
four years. You can find an English translation of this paper in the
Dover book 'The Principle of Relativity' beginning on page 99; you
will find in section 3 of that paper Einstein's derivation of the
variable speed of light in a gravitational potential, eqn (3). The
result is: c'=c0(1+phi/c^2) where phi is the gravitational potential
relative to the point where the speed of light co is measured......You
can find a more sophisticated derivation later by Einstein (1955) from
the full theory of general relativity in the weak field
approximation....For the 1955 results but not in coordinates see page
93, eqn (6.28): c(r)=[1+2phi(r)/c^2]c. Namely the 1955 approximation
shows a variation in km/sec twice as much as first predicted in 1911."

Pentcho Valev
pvalev@yahoo.com