Question

The apparent frequency in Doppler’s effect does not depend upon ___________

(a) Speed of the observer

(b) Distance between the observer and source

(c) Speed of the source

(d) Frequency of the source

I have been asked this question in an interview for internship.

Query is from Sounds and Waves in section Waves of Engineering Physics I

Answer 1

The correct answer is (b) Distance between the observer and source

Easy explanation: Apparent frequency in Doppler’s effect depends on frequency of source, direction and velocity of source and observer. It does not depend on the distance between observer and source.