| Topic: |
Science > Physics |
| User: |
"skeptic" |
| Date: |
08 Mar 2006 10:51:10 PM |
| Object: |
Black Holes and Gravitational Fields |
I'm not a physicist and I may not be using the correct terminology
but would still appreciate a simple explanation about some questions
pertaining to black holes.
If I'm not mistaken the increasingly intense gravitational field as
one approaches the event horizon causes both increasing length
contraction in the radial direction and increasing time dilation.
1. Does this mean that, although to an infalling observer he seems to
be falling faster and faster as he approaches the event horizon, to a
distant viewer, an infalling object because it is falling through ever
more contracted space, would seem to be falling more and more slowly as
it nears the event horizon?
2. Does space become contracted to zero at the event horizon? If so,
how can anything actually cross the event horizon. Likewise does the
increasing time dilation mean that nothing can cross the horizon in
finite time?
3. Does the contracted space around a black hole influence the
gravitational field so that to distant observers the gravitational
field close to the horizon seems to decrease faster than the inverse
square law.
4. It is commonly accepted that inside a black hole there are 3
dimensions of time and 1 of space? Can anyone explain how this was
determined? Are any of the dimensions inside dilated or contracted?
Is the concept of velocity still valid inside the horizon and if so
what would be velocity profile of an infalling particle once inside the
horizon.
Please forgive me if I'm totally confused and these questions don't
make any sense. Thanks for your help.
.
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| User: "Mac D." |
|
| Title: Re: Black Holes and Gravitational Fields |
09 Mar 2006 03:32:20 AM |
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Much of your questions are answered at
http://math.ucr.edu/home/baez/physics/
Scroll down about 3/4 of the way down the page and read topics under
black holes.
skeptic wrote:
4. It is commonly accepted that inside a black hole there are 3
dimensions of time and 1 of space?
No.
Can anyone explain how this was
determined? Are any of the dimensions inside dilated or contracted?
Is the concept of velocity still valid inside the horizon and if so
what would be velocity profile of an infalling particle once inside the
horizon.
We don't really know much...
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| User: "Sam Wormley" |
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| Title: Re: Black Holes and Gravitational Fields |
08 Mar 2006 11:18:12 PM |
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skeptic wrote:
I'm not a physicist and I may not be using the correct terminology
but would still appreciate a simple explanation about some questions
pertaining to black holes.
Are There Any Good Books on Relativity Theory?
http://math.ucr.edu/home/baez/physics/Administrivia/rel_booklist.html
User Profile
http://groups.google.com/groups/profile?enc_user=t_0VLBIAAAAue3XvCxF5iKVyA_70Fm668rhlH0Pnl47z4AZhN98BFg
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