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Re: Help!!!

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Posted by silverana on November 10, 2000 07:51:53 UTC

heres sth i posted in forum 1 a while ago about why a black hole isnt really black ... its to do with hawking radiation: hope it'll b useful

...a black hole isnt at all black. thanx to the magnificent STephen Hawking who successfully integrated quantum mechanics with general theory of relativity in this subject matter.

u mite have heard of the uncertainty principle which states that an object's exact posn and velocity can not be both accurately measured. in other words, we cannot have anything with 0 position and 0 velocity, as in this case both the
posn and vel are exactly predicted. so instead of 0, we have things that fluctuate just above and below 0, knonwn as te 'antimatter'. every known
existent particle pairs up with its antiparticle, and when they approach the event horizon of a black hole, the antimatter gets sucked in by gravity at an ealier stage than its buddy, therefore the left over particle is 'emitted' into space along with other particles in the form of radiation, this phenom can therefore be observed, therefore a black hole ISNT really black! (this is only a brief outline of what Hawking deliveres to its audience in his masterpiece 'A
brief history of time'. i highly recommend everyone out there whos interested in
cosmology (esp black holes) to read this book. it uses no jargon, and employs
everyday anaologies that are comprehensible.

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