Questions
A motor cyclist is moving away from a stationary observer towards a cliff with a speed v. Velocity of sound in still air is . Then beat frequency heard by the observer is [ The motor cyclist is blowing horn at frequency ]
detailed solution
Correct option is C
f1= Apparent frequency of sound directly coming from motorcyclist =f0(1+v/v0)f2= Apparent frequency of sound wave reflected from the cliff =f0(1-v/v0)∴Beat frequency =f2-f1=f0(1-v/v0)-f0(1+v/v0)=2f0vv0(v02-v2)Talk to our academic expert!
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A bus is moving towards a huge wall with a velocity of 5 m/s. The driver sounds a horn of frequency 200 Hz. Speed of sound in air is 342 m/s. Beat frequency heard by passenger is
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