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A thin layer of oil with index of refraction no = 1.47 is floating above the water. The index of refraction of water is nw =

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ho= 1.47 nm=1.3 na= 1.0 d=75oum (a) do no (b) For minimum thickness, d 2n. t min 2 => tmin 4 na tmin 4 (c) tmin = an. Ino (d)

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