wave_mechanics dopplers_effect Question 56

Question: A source emits a sound of frequency of 400 Hz, but the listener hears it to be 390 Hz. Then

[Orissa JEE 2003]

Options:

A) The listener is moving towards the source

B) The source is moving towards the listener

C) The listener is moving away from the source

D) The listener has a defective ear

Show Answer

Answer:

Correct Answer: C

Solution:

Since apparent frequency is lesser than the actual frequency, hence the relative separation between source and listener should be increasing.