How is a mirage related to refraction?

A mirage has to due with reflection when there are two separate air masses with different indices of refraction. When light goes from a medium that has a high index of refraction to one with lower index of refraction, the angle increases when measured from the normal. read more

Refraction in a Non-Uniform Medium A mirage is an optical phenomenon that creates the illusion of water and results from the refraction of light through a non-uniform medium. Mirages are most commonly observed on sunny days when driving down a roadway. read more