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What is the minimum thickness of a thin film required for constructive interference in the reflected light from it? Given, the refractive index of the film = 1.5, wavelength of the light incident on the film = 600nm |
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Answer» 100 NM `2mu t = [2n + 1](lambda)/(2)` where ,n = 0, 1, 2, 3,... For minimum THICKNESS, n = 0 `2mu t = (lambda)/(2)` `rightarrow t = (lambda)/(4mu) = (600 xx 10^(-9))/(4 xx 1.5)` = 100 nm |
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