wave_mechanics dopplers_effect Question 17
Question: A sound source is moving towards a stationary observer with 1/10 of the speed of sound. The ratio of apparent to real frequency is
[CPMT 1977; NCERT 1977; KCET 2001, 03]
Options:
A) 10/9
B) 11/10
C) $ {{(11/10)}^{2}} $
D) $ {{(9/10)}^{2}} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ n’=n( \frac{v}{v-v _{S}} )=n( \frac{v}{v-v/10} ) $
Therefore $ \frac{n’}{n}=\frac{10}{9} $
BETA
