Sunday, 21 June 2009

Sound Black Hole

Israeli physicists have created a unique phenomena - an acoustic black hole. Instead of trapping light in the form of photons (particles of light), the Technion laboratory in Haifa have created an artificial black hole which traps particles of sound - phonons.

The sound black hole was generated in attempt to detect Hawking radiation, the as yet hypothetical radiation proposed by Stephen Hawking more than 30 years ago, which causes black holes to evaporate over time.

Andrew Zimmerman Jones notes that "quantum physics indicates that pairs of "virtual phonons" are constantly being created and destroyed. If one of these pairs forms near the event horizon of the sound black hole, one of the phonons may end up getting pulled into the black hole while the other escapes." This may be the best proof yet that Hawking radiation exists.


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