393. assignment (reflection on a thin film)
Material having an index of refraction of 1.30 is used as an antireflective coating on a camera's lens made of glass (n = 1.50) (a) What should be the minimum thickness of this film in order to minimize reflection of 500 nm light? (b) If a different material with index of refraction of 1.62 is used for the coating, what minimum thickness should the new film have to produce the same effect? (c) How do the results in parts (a) and (h) change if the camera is to be operated in water (n = 1.33) instead of air?
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