Re: speed of gravity

[email removed] (Scott S. Kellogg) writes:
>
> According to the seminar on gravitiation I sat through,
> gravity propogates at the speed of light.

Time for a stupid question:

If gravity goes at the speed of light, and light goes at the speed of light,
how can gravity catch up with light?  If it can't, why can't light escape
from a black hole?

Make that two stupid questions:

What do gravity waves do when they hit a black globe?  If they get absorbed
by the black globe, then you can have a nice perpetual motion machine - have
a small vehicle carrying a black globe which switches on said globe and floats
up, then switches off the globe and falls down, then switches the globe back
on before it hits the ground and floats up, etc.

- --
 "Keyboard?  How quaint!" - M. Scott

 Adrian Hurt			     |	JANET:  [email removed]
 UUCP: ..!uknet!cee.hw.ac.uk!adrian  |  ARPA:  [email removed]