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Lens Coating Thickness

A camera manufacturer wishes to deposit a non-reflective coating onto a glass lens for a wavelength of 550 nm. The index of refraction of the coating material is 1.38 and that of the glass is 1.53. Find the smallest three possible thicknesses for the coating.

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There are two interfaces that we need to pay attention to.
They are, air-coating interface and the coating - glass interface.

At the first interface light travels from lower to higher refractive index medium.
At the second interface also, light ...

Solution Summary

Lowest three values for the thin film coating thickness is found in this answer. I have shown each step very clearly so that the student can easily understand the solution. I have provided additional details regarding solving this type of problems in the future.