Physicists Have Discovered the Ultimate Speed Limit of Sound

Physicists Have Discovered the Ultimate Speed Limit of Sound
(AP Photo/Jose Luis Magana)

The universal speed limit of any kind of wave – be it electromagnetic or gravitational – travelling through a vacuum has been known since Albert Einstein developed his theory of special relativity in 1905. But the maximum speed of sound moving through a solid or a liquid has just been calculated for the first time. It is about 36 kilometres per second, more than 8000 times lower than the speed of light in a vacuum.

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