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Calculate the minimum film thickness of a MgF2 (n(l) = 1.37) antireflection coating applied to a...

Calculate the minimum film thickness of a MgF2 (n(l) = 1.37) antireflection coating applied to a crown glass (n=1.52) lens immersed in air. Assume normal incidence. Find the required minimum film thickness for the back side of the lens where the incidence medium if glass, and for the front side of the lens where the incident medium is air. Design for a vacuum wave length of 550 nm

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