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Physics, Astronomy & Cosmology / Thunder and lightning?
« on: 23/07/2007 22:20:45 »
Lightning only takes a few milliseconds to reach the ground and return to the cloud. Thunder is the noise of the air molecules returning to the space created by the strike. So if the air returns back to its former space in a few milliseconds, why does the noise of thunder last so long (5-10 seconds)?