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April 18, 2014

Homework Help: Physic please help!

Posted by Mary on Tuesday, November 13, 2007 at 10:39pm.

A mixture of red light (vacuum = 661 nm) and green light (vacuum = 551 nm) shines perpendicularly on a soap film (n = 1.35) that has air on either side. What is the minimum nonzero thickness of the film, so that destructive interference causes it to look red in reflected light?
nm

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