 black holes in the lab
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benbradley
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Registered Member #312
Joined: Mon Mar 13 2006, 01:50AM
Location: Georgia, USA
Posts: 27
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Here's an interesting news story to help answer the OP's question (though these might be closer to "femtoscopic" than merely "microscopic":
Any black hole generated in the lab would be made of only a few particles (in this case a couple of gold atom nuclei), and thus would have an extremely, I say EXTREMELY short lifetime before totally evaporating due to Hawking radiation.
Even if the mass of a mountain were somehow compressed to make a black hole, it would surely evaporate in however long it would take (milliseconds? microseconds? Regardless, I wouldn't want to be on the same planet) rather than take in enough matter to make up for its "evaporation" by Hawking radiation. To double in mass it would have to take in a mountain of material, and even if it's going at high speed it will only take in a very small cross section of matter in its path.
Calculations I made from the formula on this page:
tells me that a one pound (2.2kG) black hole will evaporate in about one nanosecond. The lifetime varies with the cube of the mass, so the lifetime of the alleged black hole in the article would be hugely shorter.
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