A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed
Channel: Doubtnut
Date: 2020-01-19

A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of `15ms^-1`. Then the frequency of sound that the observer hears in the echo reflected from the cliff is (Take velocity of sound in air `=330ms^-1`)