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Blue Light λ\lambda vac = 440 Nm )Shines onto a Puddle of Water

Question 11

Multiple Choice

Blue light ( λ\lambda vac = 440 nm ) shines onto a puddle of water (nwater = 1.33) .There is a thin layer of oil (n = 1.47) on top of this water.What is the minimum thickness of the oil if there is constructive interference for the light?


A) 74.8 nm
B) 82.7 nm
C) 110 nm
D) 150 nm
E) 165 nm

Correct Answer:

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