wave_mechanics dopplers_effect Question 24
Question: A source and listener are both moving towards each other with speed v/10, where v is the speed of sound. If the frequency of the note emitted by the source is f, the frequency heard by the listener would be nearly
[MP PMT 1994; MP PET 2001]
Options:
A) 1.11 f
B) 1.22 f
C) f
D) 1.27 f
Show Answer
Answer:
Correct Answer: B
Solution:
When source and listener both are moving towards each other then, the frequency heard $ {n}’=n( \frac{v+v _{O}}{v-v _{S}} ) $
Therefore $ {n}’=f( \frac{v+v/10}{v-v/10} )=1.22f.
$
BETA
