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Light with wavelength 700 nm travels through a vacuum (n=1). It is normally incident upon a...

Light with wavelength 700 nm travels through a vacuum (n=1). It is normally incident upon a thin layer of oil (n=1.4), which rests upon a thick layer of glass (n=1.5).

a)  What is the minimum thickness of oil needed to minimize the light reflected from the oil?

b) What is the minimum thickness of oil needed to maximize the reflected light?

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