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Replies: 3   Last Post: Jun 19, 2013 8:12 PM

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Pentcho Valev

Posts: 3,000
Registered: 12/13/04
Posted: Jun 12, 2013 2:23 AM

Why Einstein did not believe that general relativity geometrizes gravity, Dennis Lehmkuhl: "I argue that, contrary to folklore, Einstein never really cared for geometrizing the gravitational or (subsequently) the electromagnetic field; indeed, he thought that the very statement that General Relativity geometrizes gravity "is not saying anything at all". Instead, I shall show that Einstein saw the "unification" of inertia and gravity as one of the major achievements of General Relativity."

Then why do Einsteinians refer to geometrization of gravity any time the speed of light in a gravitational field is discussed? In order to camouflage the simple fact that the speed of light varies with the gravitational potential like the speed of any material body:



That, in a gravitational field, the speed of light varies like the speed of any material body (as predicted by Newton's emission theory of light) has been confirmed by the Pound-Rebka experiment:



If, in a gravitational field, the speed of light varies like the speed of any material body, then, in gravitation-free space, it varies with the speed of the observer, as predicted by Newton's emission theory of light and in violation of Einstein's relativity:


Integrating dc/dh=g/c gives:


Equivalently, in gravitation-free space where a rocket of length h accelerates with acceleration g, a light signal emitted by the front end will be perceived by an observer at the back end to have a speed:

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

where v is the speed the observer has at the moment of reception of the light relative to the emitter at the moment of emission. Clearly, the speed of light varies with both the gravitational potential and the speed of the observer, just as predicted by Newton's emission theory of light.

Pentcho Valev


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