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Finding Black Holes

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el_oso
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Joined: 17 May 2008
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PostPosted: 21:57 - 16 Jun 2009    Post subject: Finding Black Holes Reply with quote
I have an Astronomy exam tomorrow and while going over my notes i've been wondering how they find black holes.
one method is in binary systems the dead star that has turned into a black holes begins to suck material away from its partner star. AS this material get sucked in it emits x-rays. how? didn't think that nothing could escape black holes as the escape velocity is greater than the speed of light, and X-rays travel at the speed of light?

not sure if this is in the right forum but it is geeky
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bazza
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Joined: 27 Aug 2004
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PostPosted: 23:12 - 16 Jun 2009    Post subject: Reply with quote
Gravitational lensing.
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el_oso
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PostPosted: 00:22 - 17 Jun 2009    Post subject: Reply with quote
bazza wrote:
Gravitational lensing.


thats another method though whereby light gets bent by warped space created by the black hole.
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bazza
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PostPosted: 11:43 - 17 Jun 2009    Post subject: Reply with quote
the_godfather wrote:
bazza wrote:
Gravitational lensing.


thats another method though whereby light gets bent by warped space created by the black hole.


Yes. I know.

Rolling Eyes
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