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Question
A soap bubble is 100 nm thick and illuminated by white light incident at a $45^\circ$ to its surface. What wavelength and color of visible light is most constructively reflected, assuming the same index of refraction as water?
Question by OpenStax is licensed under CC BY 4.0.
Final Answer
$754 \textrm{ nm}$
This is the color red.
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OpenStax College Physics Solution, Chapter 27, Problem 81 (Problems & Exercises) (5:07)

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