Question

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 : [2016]
(Take velocity of sound in air = 330 ms⁻¹)
(a) 765 Hz (b) 800 Hz
(c) 838 Hz (b) 885 Hz

Answer 1

Answer:

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 : [2016]

(Take velocity of sound in air = 330 ms⁻¹)

(a) 765 Hz (b) 800 Hz

(c) 838 Hz (b) 885 Hz

here is your answer.

(c) 838 Hz

Answer 2

Answer:

800 Hz

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