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A thin filme of acetone (n=1.26) coats a plate of glass (n=1.5). White light is incident...

A thin filme of acetone (n=1.26) coats a plate of glass (n=1.5). White light is incident normal on to the film. In the reflections, fully destructive interference happens at 598 nm and fully constructive interference happens at 747.5 nm.

1)

What is the thickness of the film?

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