A source emitting sound waves of frequency 100 Hz in air is observed by an observer…
Physics · NEET · NTA Exams — Oscillations and Waves
A source emitting sound waves of frequency 100 Hz in air is observed by an observer moving with a constant velocity of 60 m/s away from the source. The frequency of the sound as observed by the observer (velocity of the sound in air is 330 m/s)
- remains unchanged
- decreases by 15.4%
- decreases by 10%
- none of the above
Answer
(B) decreases by 15.4%
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