Wave Motion 3 Question 4
4. A source of sound of frequency $600 Hz$ is placed inside water. The speed of sound in water is $1500 m / s$ and in air it is $300 m / s$. The frequency of sound recorded by an observer who is standing in air is
(a) $200 Hz$
(b) $3000 Hz$
(c) $120 Hz$
(d) $600 Hz$
(2004, 2M)
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Answer:
Correct Answer: 4. (d)
Solution:
- The frequency is a characteristic of source. It is independent of the medium. Hence, the correct option is (d).
