Wave Mechanics Question 836
Question: A man standing on a cliff claps his hand hears its echo after 1 sec. If sound is reflected from another mountain and velocity of sound in air is 340 m/sec. Then the distance between the man and reflection point is
[RPET 2000]
Options:
A) 680 m
B) 340 m
C) 85 m
D) 170 m
Show Answer
Answer:
Correct Answer: D
Solution:
If d is the distance between man and reflecting surface of sound then for hearing echo $ 2d=v\times t\Rightarrow d=\frac{340\times 1}{2}=170,m $
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