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    Can someone tell me an interesting fact about black holes?

    Question #29047. Asked by roobear. (Mar 04 03 1:22 AM)


    Gnomon

    		Black holes are not completely black. They give off tiny amounts of energy, so they are really dark grey. This energy is called Hawking radiation and happens due to a Quantum Mechanical effect called 'tunneling'. Over time, the black hole will evaporate, eventually disappearing in a blinding flash. This takes a long time, though. For any currently existing black holes, they will survive for a lot longer than the present age of the universe before they evaporate.

    Mar 04 03, 7:55 AM

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