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A hair is placed at one edge between two flat glass plates 10.7 cm long. When...

A hair is placed at one edge between two flat glass plates 10.7 cm long. When this arrangement is illuminated with 619 nm light, 132 bands are counted, starting at the point of contact of the two plates. How thick is the hair? Answer in units of m. I've tried 4.054E5 and got it wrong

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3.714E-05 m

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