A Thin Layer of Oil (N = 1

question 42

Multiple Choice

A thin layer of oil (n = 1.25) is on top of a puddle of water (n = 1.33) . If normally incident 500 nm light is strongly reflected, what is the minimum thickness of the oil layer?

• A)200 nm
• B)250 nm
• C)100 nm
• D)400 nm
• E)150 nm

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