🚀 go-pugleaf

On Mar 31, 3:51 pm, PD <TheDraperFam...@gmail.com> wrote:
> On Mar 30, 12:28 am, Pentcho Valev <pva...@yahoo.com> wrote:
>
> > A rocket with length h accelerates with acceleration g. A light source
> > at the front end emits light with speed c relative to the source. A
> > receiver at the back end receives the light and measures its speed c'
> > to be:
>
> > Premise 1: constant, c'=c.
>
> > Premise 2: variable, c'=c+v, where v is the relative speed of the
> > light source (at the moment of emission) and the receiver (at the
> > moment of reception).
>
> > A light source at the top of a tower of height h emits light with
> > speed c relative to the source. A receiver on the ground receives the
> > light.
>
> > Prediction 1 deduced from Premise 1: The receiver on the ground will
> > measure the speed of light to be constant, c'=c.
>
> Not quite right. The receiver on the ground will measure the speed of
> light to be constant, c'=c, AND the receiver will also measure the
> gravitational redshift factor to be 1 + gh/c^2. Both of these
> statements are confirmed by experiment, and both of those statements
> are consistent with GR as published in 1915.
>
> Einstein did not formulate the *correct* theory of GR until 1915. Work
> beyond SR and prior to 1911 contained a number of statements that were
> later corrected by himself. It is not unusual in science for an author
> to publish "work in progress" which later gets corrected.

Why don't you learn by rote Master Steve Carlip's explanation:

http://math.ucr.edu/home/baez/physics/Relativity/SpeedOfLight/speed_of_light.html
Master Steve Carlip: " Einstein went on to discover a more general
theory of relativity which explained gravity in terms of curved
spacetime, and he talked about the speed of light changing in this new
theory.  In the 1920 book "Relativity: the special and general theory"
he wrote: ". . . according to the general theory of relativity, the
law of the constancy of the velocity of light in vacuo, which
constitutes one of the two fundamental assumptions in the special
theory of relativity [. . .] cannot claim any unlimited validity.  A
curvature of rays of light can only take place when the velocity of
propagation of light varies with position."  Since Einstein talks of
velocity (a vector quantity: speed with direction) rather than speed
alone, it is not clear that he meant the speed will change, but the
reference to special relativity suggests that he did mean so.  This
interpretation is perfectly valid and makes good physical sense, but a
more modern interpretation is that the speed of light is constant in
general relativity."

As you can see, in 1920 Einstein still believed in a gravitational
field the speed of light is variable and "this interpretation is
perfectly valid and makes good physical sense" but, on the other hand,
Master Steve Carlip also says the speed of light is constant and
that's it. As long as you repeat Master Steve Carlip's words and do
not try to advance your zombie ideas, no anti-relativist will be able
to prove you wrong.

Pentcho Valev
pvalev@yahoo.com