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OCW Scholar - Physics I: Classical Mechanics 22 Online
OpenStudy (anonymous):

Monochromatic light ( = 500 nm) is incident on a soap bubble (n = 1.4) that is 500-nm thick. What is the change of phase (in degrees) of the light that penetrates the front surface, reflects from the second surface, and emerges through the first surface? a. 280 b. 160 c. 220 d. 100 e. 290 Any help?

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