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Question
What are the three smallest non-zero thicknesses of soapy water ($n = 1.33$) on Plexiglas if it appears green (constructively reflecting 520-nm light) when illuminated perpendicularly by white light? Explicitly show how you follow the steps in Problem Solving Strategies for Wave Optics.
Question by OpenStax is licensed under CC BY 4.0.
Final Answer
$t_2 = 195 \textrm{ nm}$
$t_3 = 390 \textrm{ nm}$
$t_4 = 585 \textrm{ nm}$
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OpenStax College Physics Solution, Chapter 27, Problem 75 (Problems & Exercises) (5:38)

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