A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m s - 1 . The frequency heard by the observer (in Hz ) is (Speed of sound = 330 m s - 1 )

Question

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m s - 1 . The frequency heard by the observer (in Hz ) is (Speed of sound = 330 m s - 1 ), 409, 429, 517, 500

MARKS App · Accepted Answer

The source is moving towards the observer f ⁡ ' = f ⁡ v ⁡ v ⁡ - v ⁡ 1 = 450 330 330 - 33 f ⁡ ' = 500 Hz

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