Physics

Max Dyer

1 November, 06:44

Anti-reflective coatings on lenses use thin-film interference to eliminate the reflection of a particular color. Suppose a glass lens (ng = 1.53) is covered with a thin film (nf = 1.31) to prevent green light (λ = 534 nm) from being reflected.

(a) write an expression for the minimum thickness the film can have, t.

(b) Calculate the minimum thickness, t, in nanometers?

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