Answered: Problem 12.2 Light of wavelength A in a… | bartleby

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Problem 12.2
Light of wavelength A in a medium of refractive index n₁ is normally incident on a thin film of
refractive index n2 and optical thickness A/4 which coats a plane substrate of refractive index n3.
Show that the film is a perfect anti-reflector (r= 0) if n2 = n₁n3.

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