An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?

Question

An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?, 5 %, 20 %, zero, 0.5 %

MARKS App · Accepted Answer

f app = f 0 v + v 0 v f app - f 0 f 0 = v 0 v = v 5 v = 1 5 = 20 %

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