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[[Image:lighterstill.jpg]][[Image:[[Image:Light dispersion conceptual.gif|right|frame]]

[[Image:lighterstill.jpg]][[Image:Light dispersion conceptual.gif|right|frame]]

'''Refraction''' is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one [[medium]] to another. Refraction of [[light]] is the most commonly observed example, but any type of wave can refract when it interacts with a medium, for example when [[sound]] waves pass from one medium into another or when water waves move into water of a different depth. Refraction is described by Snell's law, which states that the angle of incidence is related to the angle of refraction by

'''Refraction''' is the change in direction of a wave due to a change in its speed. This is most commonly observed when a wave passes from one [[medium]] to another. Refraction of [[light]] is the most commonly observed example, but any type of wave can refract when it interacts with a medium, for example when [[sound]] waves pass from one medium into another or when water waves move into water of a different depth. Refraction is described by Snell's law, which states that the angle of incidence is related to the angle of refraction by