wave_mechanics dopplers_effect Question 37
Question: A source of sound is travelling with a velocity 40 km/hour towards observer and emits sound of frequency 2000 Hz. If velocity of sound is 1220 km/hour, then what is the apparent frequency heard by an observer
[AFMC 1997]
Options:
A) 2210 Hz
B) 1920 Hz
C) 2068 Hz
D) 2086 Hz
Show Answer
Answer:
Correct Answer: C
Solution:
$ {n}’=n( \frac{v}{v-v _{S}} )=\frac{2000\times 1220}{(1220-40)}=2068 $
$ Hz $
BETA
