(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

If the apparatus for showing Newton's rings is illuminated with light at 6250 A (angstroms), what thickness of film underlies each of the first three light rings?

2. Relevant equations

2D (the thickness of the film) equals a multiple of 1/2 of a wavelength

1 angstrom = 1 x 10^-10 wavelength

3. The attempt at a solution

I can't see how the angstroms connect to the fact that the thickness must be a multiple of 1/2.

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# Homework Help: Simple Newton's Rings problem

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