Optics Question 1013

Question: For constructive interference to take place between two monochromatic light waves of wavelength l, the path difference should be

[MNR 1992; UPSEAT 2001]

Options:

A) $ (2n-1)\frac{\lambda }{4} $

B) $ (2n-1)\frac{\lambda }{2} $

C) $ n\lambda $

D) $ (2n+1)\frac{\lambda }{2} $

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Answer:

Correct Answer: C

Solution:

For constructive interference path difference is even multiple of $ \frac{\lambda }{2} $ .



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