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'''Refraction''' is the change in direction of [[light]] when moving from one medium to another. Refraction produces [[rainbow]]s and a similar effect in a [[prism]]. It is also the principle used in [[eyeglasses]] and the refracting [[telescope]].
'''Refraction''' is the change in direction of [[light]] when moving from one medium to another. Refraction produces [[rainbow]]s and a similar effect in a [[prism]]. It is also the principle used in [[eyeglasses]] and the refracting [[telescope]]. The degree to which a medium refracts light is expressed as that medium's [[index of refraction]].
The amount that the direction changes when moving between the two media is determined by [[Snell's Law]].
The amount that the direction changes when moving between the two media is determined by [[Snell's Law]].
[[category:physics]]
[[category:physics]]