Orange light (vacuum = 611 nm) shines on a soap film (n = 1.33) that has air
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Orange light (λvacuum = 611 nm) shines on a soap film (n = 1.33) that has air on either side of it. The light strikes the film perpendicularly. What is the minimum thickness of the film for which constructive interference causes it to look bright in reflected light?
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