Question

A source of sound having frequency 300 Hz emitted waves of wavelength 1m. The listner is at rest and the source ismoving away from him with a velocity of 30 m/sec. Find
the frequency heared by observer .​

Answer 1

vel of sound =300×1=300

1. freq heard=n × v of sound/ v of sound+vof source
2. freq heard = 300× 300÷(300+30)=300×300÷330=272.72
3. so ans is 272.72 hz

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