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Sound waves travel at 350 m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
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- decreases by a factor 10
- increases by a factor 20
- increases by a factor 10
- decreases by a factor 20
Correct Option: C
We have, v = nλ
⇒ v ∝ λ (as n remains constant)
Thus, as v increases 10 times, λ also increases 10 times.
