Whilst its a bit sneaky of me, Steven once said (
in another thread which got onto black holes and gravitons):
Quote:
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Originally Posted by sjastro
In GR photons travel along what are known as null geodesics or the shortest pathway that can be taken in a gravitational field.
For black holes, this null geodesic wraps itself around the black hole inside the horizon. The photon isn't held there due to gravity but is constrained by the extreme space time curvature.
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Don't you hate it when someone digs up stuff from the past ?
I never did quite get to the bottom of this one, though (which is kind of why I dug this up).
I presume this is fairly speculative and I hope he doesn't mind.
Cheers