The Minimum Film Thickness for Which a Reflection Maximum Occurs

Multiple Choice

The minimum film thickness for which a reflection maximum occurs is the same in all of the following situations except

A) when the film is surrounded by a material of larger index of refraction.
B) when the film is surrounded by a material of smaller index of refraction.
C) when the film is bordered by a material of larger index of refraction on one side and a material of smaller index of refraction on the other side.
D) Hold it! There are no exceptions.