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A person having a whistle, emitting continuously a sound of frequency 660 Hz. While producing this sound he is running towards a vertical wall with a speed of 5m/s. If the speed of sound in air is 335m/s then number of beats heard by him area) 20Hzb) 10 Hzc) 8 Hzd) zero

Answer» A person having a whistle, emitting continuously a sound of frequency 660 Hz. While producing this sound he is running towards a vertical wall with a speed of 5m/s. If the speed of sound in air is 335m/s then number of beats heard by him are
a) 20Hz
b) 10 Hz
c) 8 Hz
d) zero


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