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A source of sound of frequency 165 Hz g...

A source of sound of frequency 165 Hz generates sound waves which get fully reflected from a wall . A person standing at the wall starts moving away from the wall. The minimum distance of the point from the wall at which the person hears maximum sound is (velocity of sound = 330 `ms^(-1)`)

A

1m

B

2 m

C

1/2 m

D

1/4 m

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The correct Answer is:
A
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