If a source emitting waves of frequency f moves towards an observer with a velocity v 4 and the observer moves away from the source with a velocity v / 6 , the apparent frequency as heard by the observer will be (v= velocity of sound)

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Correct answer: C. 10 9 f

When source and observer both are moving in the same direction and observer is ahead of source, then apparent frequency f^ = v-v_ o v-v_ s f = v- v 6 v- v 4 = 5 v 6 3 v 4 f= 10 9 f

If a source emitting waves of frequency f moves towards an observer with a velocity v 4 and the observer moves away from the source with a velocity v / 6 , the apparent frequency as heard by the observer will be (v= velocity of sound)

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