http://bartleby.net/173/22.html
Albert Einstein: "In the second place our result shows that, 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 and to
which we have already frequently referred, 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. Now we might
think that as a consequence of this, the special theory of relativity
and with it the whole theory of relativity would be laid in the dust.
But in reality this is not the case. We can only conclude that the
special theory of relativity cannot claim an unlimited domain of
validity; its result hold only so long as we are able to disregard the
influences of gravitational fields on the phenomena (e.g. of light)."

Einstein's "logic" in the above text: In a gravitational field, the
speed of light "varies with position", that is, with the gravitational
potential. Therefore, if the gravitational potential does not vary
with position (if the field is zero), then the speed of light is
constant. This means that Einstein's 1905 constant-speed-of-light
postulate is true.

Initially, this "logic" makes believers sing "Divine Einstein" and
"Yes we all believe in relativity, relativity, relativity":

http://www.haverford.edu/physics/songs/divine.htm
No-one's as dee-vine as Albert Einstein
Not Maxwell, Curie, or Bohr!
He explained the photo-electric effect,
And launched quantum physics with his intellect!
His fame went glo-bell, he won the Nobel --
He should have been given four!
No-one's as dee-vine as Albert Einstein,
Professor with brains galore!
No-one could outshine Professor Einstein --
Egad, could that guy derive!
He gave us special relativity,
That's always made him a hero to me!
Brownian motion, my true devotion,
He mastered back in aught-five!
No-one's as dee-vine as Albert Einstein,
Professor in overdrive!

http://www.youtube.com/watch?v=5PkLLXhONvQ
We all believe in relativity, relativity, relativity.
Yes we all believe in relativity, 8.033, relativity.
Einstein's postulates imply
That planes are shorter when they fly.
Their clocks are slowed by time dilation
And look warped from aberration.
We all believe in relativity, relativity, relativity.
Yes we all believe in relativity, 8.033, relativity.

In the end the ecstasy gets uncontrollable - believers tumble to the
floor, start tearing their clothes and go into convulsions.

A VALID argument based on Einstein's equivalence principle (Einstein
was well aware of this VALID argument): If the speed of light varies
with the gravitational potential, then, in the absence of a
gravitational field, the speed of light varies with the speed of the
light source. This means that Einstein's 1905 constant-speed-of-light
postulate is false.

The following application of Einstein's equivalence principle might
prove instructive:

A light source on top of a tower of height h emits light with
frequency f and speed c (relative to the source). The light reaches an
observer on the ground with frequency f' and speed c' (relative to the
observer).

Equivalently, a light source at the front end of an accelerating
rocket of length h and accelaration g emits light with frequency f and
speed c (relative to the source). The light reaches an observer at the
back end with frequency f' and speed c' (relative to the observer).

Is c' equal to c or is c' different from c? That is, is Einstein's
1905 constant-speed-of-light postulate correct or not? No priest in
Einsteiniana would directly answer this fatal question - the crimestop
is absolute in this case:

http://www.liferesearchuniversal.com...html#seventeen
George Orwell: "Crimestop means the faculty of stopping short, as
though by instinct, at the threshold of any dangerous thought. It
includes the power of not grasping analogies, of failing to perceive
logical errors, of misunderstanding the simplest arguments if they are
inimical to Ingsoc, and of being bored or repelled by any train of
thought which is capable of leading in a heretical direction.
Crimestop, in short, means protective stupidity."

Still Einsteiniana's priests find it safe to use, in calculations, the
correct answer to the fatal question:

The correct answer: c'c as predicted by Newton's emission theory of
light.

Consider equation (13.2) on p. 3 in David Morin's text:

http://student.fizika.org/~jsisko/Kn...Morin/CH13.PDF
f' = f(1+v/c) = f(1+gh/c^2) (13.2)

where v is the relative speed of the light source (at the moment of
emission) and the observer (at the moment of reception) in the rocket
scenario. By combining this equation with:

(frequency) = (speed of light)/(wavelength)

we obtain THE FUNDAMENTAL EQUATIONS OF NEWTON'S EMISSION THEORY OF
LIGHT:

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

which CONTRADICT EINSTEIN'S 1905 FALSE CONSTANT-SPEED-OF-LIGHT
POSTULATE.

Einstein explicitly used the equation c'=c(1+gh/c^2) in the period
1907-1915, then replaced it with c'=c(1+2gh/c^2), which means that in
any version of Einstein's general relativity we have c'c.

David Morin's text referred to above reappears as Chapter 14 in:

http://www.people.fas.harvard.edu/~djmorin/book.html
Introduction to Classical Mechanics With Problems and Solutions
David Morin, Cambridge University Press

Pentcho Valev