1.

For constructive interference to take place between two monochromatic light waves of wavelength l, the path difference should be [MNR 1992; UPSEAT 2001]

A. \[(2n-1)\frac{\lambda }{4}\]
B. \[(2n-1)\frac{\lambda }{2}\]
C. \[n\lambda \]
D. \[(2n+1)\frac{\lambda }{2}\]
Answer» D. \[(2n+1)\frac{\lambda }{2}\]


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