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Jan5-05, 03:23 PM
Sci Advisor
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Hurkyl's Avatar
P: 16,091
The gravitational field outside the black hole is already there; it doesn't need to "escape".

Of course, anything that happens inside the black hole cannot propagate to the outside... so any gravitational waves that are inside the hole never make it out.

The same, incidentally, is true of the electromagnetic field of the hole.