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Determine what happens to the double sli...

Determine what happens to the double slits interference pattern if one of the slits is covered with a thin, transparent film whose thickness is `lambda/(2(mu-1))`, where `lambda` is the wavelength of the incident light and mu is the index of refraction of the film.

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Path difference produced by slab,
` Deltax = (mu-1)t = lambda/2`
`lambda/2` path difference is equivalent to `180^@` phase
difference. Hence, maxima and minima
interchange their positions.
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DC PANDEY ENGLISH-INTERFERENCE AND DIFFRACTION OF LIGHT-Level 1Subjective
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