Questions
A source of sound of frequency 256 Hz is moving rapidly towards a wall with a velocity of 5 m/s. The speed of sound is 330 m/s. If the observer is between the wall and the source, then beats per second heard will be
detailed solution
Correct option is A
The observer will hear two sound, one directly from source and other from reflected image of sound Hence number of beats heard per second =vv−vS n−vv+vS n=2nvvSv2−vS2=2×256×330×5335×325=7.8 HzTalk to our academic expert!
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An observer is moving towards the stationary source of sound, then
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