black hole question

[sam1111]

Is it possible for a black hole to lose power?

If the answer is no, shouldn't it be virtually impossible for anything other than a single large black hole to exist? And in result would the big bang theory not be an event but rather a cycle?

 

Thanks!

Edited March 16, 2011 by sam1111

[rktpro]

Black Hole, after a long time, looses the matter it had captured in form of thin gas of particles. This process by which it loose matter is known as Hawking process.

This process is very very slow and takes a lot of time!

Big Bang is a cycle. Big Bang is followed by Big Crunch and then Big Bang again.

[steevey]

Black Hole, after a long time, looses the matter it had captured in form of thin gas of particles. This process by which it loose matter is known as Hawking process.

This process is very very slow and takes a lot of time!

Big Bang is a cycle. Big Bang is followed by Big Crunch and then Big Bang again.

 

Is there actually any actual evidence for black holes evaporating? Because it doesn't really make sense that matter would be lost from it, unless its somehow converted into Gauge Bosons and then emitted as gravitational energy, which I don't even think is a real theory.

Edited March 16, 2011 by steevey

[IM Egdall]

Two virtual particles (one matter and one anti-matter) appear out of the vacuum for an extremely brief amount of time, determinined by Heisenberg's Uncertainty Principle on energy and time. They collide and annihilate each other. There is significant emperical evidence for this (e.g Lamb shift).

 

Hawking Radiation: The two virtual particles appear at the edge of a black hole event horizon. One of the particles is absorbed into the black hole. The other escapes as a real particle. The absorbed particle has negative energy; the emitted particle has positive energy. As a result, the black hole's mass is reduced by a tiny amount. Eventually, the black hole evaporates. There is no supporting evidence yet for this effect.

 

See: http://en.wikipedia....wking_radiation

Edited March 16, 2011 by I ME

[Spyman]

The Great Cosmic Battle

The expansion of the Universe itself provides an intensely dramatic example of the ubiquitous struggle between the force of gravity and entropy. As the Universe expands and becomes more spread out, gravity resists this trend and tries to pull the expanding Universe back together. The particular fate which our future holds depends on whether gravity wins or loses this cosmic battle, whose outcome depends on the total amount of mass and energy contained within the Universe. Current astronomical data strongly suggest that gravity has already lost this critical conflict and our fate will be determined by a continued and unending expansion.

http://www.astrosociety.org/pubs/mercury/0001/cosmic.html