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On Fri, 28 Apr 2000, Joel Rauber wrote in part:
Jack wrote in part:horizon. In the
. . .
The static gravitational effects that we can observe are
embedded in the
metric (more strictly, the curvature) outside of the
larger as weusual metric, the gravitational effects get larger and
---------approach the black hole until they blow up at the horizon,--------------------------------------snip-------------------
where there is
a coordinate singularity. . . .
Schwarzchild black hole
There exist other coordinate systems to describe a
that have no coordinate singularities at the event horizon.One oft cited
example are the Kruskal-Szekeres coordinates (named aftertheir creators, I
assume) See the book "Gravitation" by Misner, Thorne andWheeler (know to
many students as MTW) around page 831 for a discussion.And, conversely, I would not have put it Joel's way, having
Joel
specifically referred to "coordinate singularity" and "event horizon".
I would not get into such technical details as Kruskal-Szekeres
coordinates in responding to a simple, naive question about gravity.
My description was accurate; it spoke of gravitational effects
<in the usual metric>. Since the question was, "how do the
gravitational
forces get out" the additional details would seem to be irrelevant to
the question asked.
Regards,
Jack