Wave Motion 3 Question 4

4. A source of sound of frequency 600Hz is placed inside water. The speed of sound in water is 1500m/s and in air it is 300m/s. The frequency of sound recorded by an observer who is standing in air is

(a) 200Hz

(b) 3000Hz

(c) 120Hz

(d) 600Hz

(2004, 2M)

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Answer:

Correct Answer: 4. (d)

Solution:

  1. The frequency is a characteristic of source. It is independent of the medium. Hence, the correct option is (d).


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