A motor cyclist travelling with a speed of 33 m/s towards a high cliff sounds a horn at frequency 500 Hz. An observer is standing on the ground in between the motor cyclist and the cliff. Then wave length of reflected sound wave heard by the observer is [Velocity of sound in air = 330 m/s]

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120 cm

93.33 cm

102.42 cm

59.4 cm

answer is D.

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Detailed Solution

Frequency of sound wave heard by the observer, f=5001-33330 Hz=555.5 Hz∴Wave length of reflected sound wave =330555.5 m==59.4 cm

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