wave_mechanics interference_and_superposition_of_waves Question 1

Question: There is a destructive interference between the two waves of wavelength l 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

[MP PET 1985]

Options:

A) $ \frac{\lambda }{4} $

B) $ \frac{\lambda }{2} $

C) $ \frac{3\lambda }{4} $

D) $ \lambda $

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Answer:

Correct Answer: B

Solution:

With path difference$ \frac{\lambda }{2} $ , waves are out of phase at the point of observation.