What medium does a sound wave move through the slowest?

1 Answer
Aritra G.
Jun 5, 2016

The rarer the medium, the slower will the sound wave move through. Thus, it moves slowest through rarefied gases i.e. gases under very low pressure. The lower the pressure, that is, the rarer the gas is, sound travels slower and if you reach a vacuum, sound can't travel through it at all.

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