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From: Gordon Stangler on 7 Sep 2009 13:09
Recast the physics in the form of geodesics, and you will find that it
is indeed possible for spacetime to be bent enough for light to "not
escape from" a black hole. If you need help on this, BURT, I highly
recommend "An Introduction to Relativity, Cosmology, and Gravitation"
by Ta-Pei Cheng. It is an immensely readable, enjoyable, and well
designed book. Please, do the exercises given, as they help with
understanding the material.

http://www.amazon.com/Relativity-Gravitation-Cosmology-Introduction-Physics/dp/0199573646/ref=sr_1_1?ie=UTF8&s=books&qid=1252343275&sr=1-1
From: BURT on 7 Sep 2009 15:17
On Sep 7, 9:09 am, Gordon Stangler <gordon.stang...(a)gmail.com> wrote:
> Recast the physics in the form of geodesics, and you will find that it
> is indeed possible for spacetime to be bent enough for light to "not
> escape from" a black hole.  If you need help on this, BURT, I highly
> recommend "An Introduction to Relativity, Cosmology, and Gravitation"
> by Ta-Pei Cheng.  It is an immensely readable, enjoyable, and well
> designed book.  Please, do the exercises given, as they help with
> understanding the material.
>
> http://www.amazon.com/Relativity-Gravitation-Cosmology-Introduction-P...

There are no geodesics for light. They simply always follows a
parabola in gravity. A geodesic can only be an arc of the parabola
path.
If a geodesic can go in that path can also go out.
The term geodesic is a misuse.
Mitch Raemsch
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