A bat moving at 10 ms -1 towards a wall sends a sound signal of 8000 Hz towards it. On reflection it hears a sound of frequency f. The value of f in Hz is close to (speed of sound = 320 ms -1 )
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Verified by ExpertsThe correct answer is:
D
We can assume that reflected wave is due to image of B coming with same speed in opposite direction
Observer
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