Originally Posted By: Bill 6
The stronger the object's gravitational field the greater that variation and on that basis - as a star collapses the rate of departure of a beam of light traveling away from that (fixed location) source gradually reduces to zero in some cases.


Well, that is obviously wrong. The speed of light, measured in any reference frame, is always the same, approximately 300 million meters per second. What happens as light travels away from the star is that it is red shifted until the frequency gets to zero. Since energy is equal to Planck's constant multiplied by the frequency (e = Hf) then at that point it has effectively zero energy. The energy it had before has been transferred to the gravitational energy of the star. Possibly the source you are quoting misunderstood the way it works.

Bill Gill

Last edited by Bill; 04/17/11 05:13 PM.
C is not the speed of light in a vacuum.
C is the universal speed limit.