Physicshard · Past Paper
What happens to the wavelength of a sound wave if its frequency is doubled while keeping speed constant?
AIt doubles
BIt remains the same
CIt is halved
DIt quadruples
✓ Correct Answer: C — It is halved
Since v = f * lambda, if speed (v) is constant, frequency (f) and wavelength (lambda) are inversely proportional. Doubling frequency halves wavelength.
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