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Questions  

There is a destructive interference between the two waves of wavelength λ coming from two different paths at a point. To get maximum sound or constructive interference at that point, the path of one wave is to be increased by

a
λ4
b
λ2
c
3λ4
d
λ

detailed solution

Correct option is B

With path difference λ2, waves are out of phase at the point of observation.

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