A camera lens is made of glass that has an index of
Chapter , Problem 85(choose chapter or problem)
A camera lens is made of glass that has an index of refraction of 1.60. This lens is coated with a magnesium fluoride film (index of refraction equal to 1.38) to enhance its light transmission. The purpose of this film is to produce zero reflection for light that has a wavelength of Treat the lens surface as a flat plane and the film as a uniformly thick flat film. (a) What minimum thickness of this film will accomplish its objective? (b) Would there be destructive interference for any other visible wavelengths? (c) By what factor would the reflection for light of wavelength be reduced by the presence of this film? Neglect the variation in the reflected light amplitudes from the two surfaces.
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