Waves - Result Question 69
71. A siren emitting a sound of frequency
[2016]
(Take velocity of sound in air
(a)
(b)
(c)
(b)
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Answer:
Correct Answer: 71. (c)
Solution:
- (c) According to Doppler’s effect in sound
Apparent frequency,
The frequency of sound observer hears in the echo reflected from the cliff is
