Problem: White light is incident normally on a thin soap film (n = 1.33) suspended in air.What are the two minimum thicknesses that will constructively reflect yellow (λ = 590 nm) light?

FREE Expert Solution

The equation for a constructive interference is:

2ηt=(m+12)λ, where t is the thickness of the film and η is the refractive index of the film.

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Problem Details

White light is incident normally on a thin soap film (n = 1.33) suspended in air.

What are the two minimum thicknesses that will constructively reflect yellow (λ = 590 nm) light?

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