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MHT CET 2026 (11 Apr, Shift 1) · Speed of Waves

Speed of Waves question from MHT CET 2026 (11 Apr, Shift 1)

Q3MHT CET 2026 · 11 APR · SHIFT 1Easy

Speed of Waves

What is the effect of humidity on sound waves when humidity increases?

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Answer: (a)

Water vapour ( $M = 18$ ) is lighter than dry air ( $M \approx 29$ ), so moist air has lower density.
$v = \sqrt{\gamma P/\rho}$ increases as $\rho$ decreases.
So the answer is (a) Speed of sound waves is more.

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