Satisfy yourself of the fact that a film of thickness 4 and index n 1 will always reduce the reflectance of the substrate on which it is deposited, as long as n s n 1 n 0 Consider the simplest case of normal incidence and n 0 1 Show that this is equivalent to saying that the waves reflected back fr...

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Satisfy yourself of the fact that a film of thickness /4 and index n 1

Question:

Satisfy yourself of the fact that a film of thickness λ_ƒ/4 and index n₁ will always reduce the reflectance of the substrate on which it is deposited, as long as n_s > n₁ > n₀. Consider the simplest case of normal incidence and n₀ = 1. Show that this is equivalent to saying that the waves reflected back from the two interfaces cancel one another.

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