wave_mechanics dopplers_effect Question 31
Question: An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is
[EAMCET (Engg.) 1995; CPMT 1999]
Options:
A) 90 Hz
B) 100 Hz
C) 91 Hz
D) 110 Hz
Show Answer
Answer:
Correct Answer: A
Solution:
$ n’=n( \frac{v-v _{O}}{v} )=( \frac{330-33}{330} )\times 100=90 $
$ Hz $
BETA
