Pentcho Valev wrote:
Mahmoud In My Dinner Jacket wrote:
Pentcho Valev wrote:
Albert Einstein, "Relativity", Chapter 7: "There is hardly a simpler
law in physics than that according to which light is propagated in
empty space. Every child at school knows, or believes he knows, that
this propagation takes place in straight lines with a VELOCITY c=300000
km/s."

Chapter 22: "...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."

Tom Roberts: "AFAIK Einstein basically thought in German, which does
not have different words for "speed" and "velocity" ("die
Geschwindigkeit" is used for both). Certainly his "velocity of
propagation" could be phrased as "speed of propagation" without
changing the underlying physics."

Sam Wormley and Dirk Van de moortel: "Valev confuses *velocity* of
light with *speed* of light!", "The fact that Valev doesn't understand
the difference between speed and velocity." etc. (repeated many times).

All those precious analyses should give an answer to the following
question:

CAN THE SPEED OF LIGHT EXCEED 300000 km/s IN A GRAVITATIONAL FIELD?

Pentcho Valev

Yes, but "globally", not locally. A (closer to the planet) sees the
*speed* of light at B (farther away from the planet) to be *higher*.
(And B sees the speed of light at A to be *lower*.)

Isn't it difficult to learn such idiocies by rote?

You're telling me! I had to train hard for six years to qualify as a
DI (Doctor of Idiocy). But any fool can be sensible.

How does A measure the [local value of the] speed of light at B?

He doesn't. B does.

Pentcho Valev