The source of sound generating a frequency of 3 kH z reaches an observer with a speed of 0.5 times the velocity of sound in air. The frequency heard by the observer is
A
1 kHz
B
2 kHz
C
4 kHz
D
6 kHz
Text Solution
Verified by Experts
The correct Answer is:
D
Apparent frequency heard will be n' = n `n/(v-v_(s))` v = velocity of sound, `v_(s)` = velocity of source of sound n = frequency - 3 KHz `therefore" "n'= 3xx v/(v-0.5_(v))=3xxv/(0.5_(v))=6kHz`
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