(a) What is the smallest thickness of a soap film n = 1.33 that would appear black...
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(a) What is the smallest thickness of a soap film n = 1.33 that would appear black if illuminated with 480-nm light? Assume there is air on both sides of the soap film.
(b) What are two other possible thicknesses for the film to appear black?
(c) If the thickness was much less than λ why would the film also appear black?
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