wave_mechanics dopplers_effect Question 47
Question: A source is moving towards an observer with a speed of 20 m/s and having frequency of 240 Hz. The observer is now moving towards the source with a speed of 20 m/s. Apparent frequency heard by observer, if velocity of sound is 340 m/s, is
[CPMT 2000; KCET 2001; MH CET 2004]
Options:
A) 240 Hz
B) 270 Hz
C) 280 Hz
D) 360 Hz
Show Answer
Answer:
Correct Answer: B
Solution:
$ n’=n( \frac{v+v _{O}}{v-v _{S}} )=240( \frac{340+20}{340-20} )=270Hz $ .
BETA
