Snell's Law

Snell's law describes how the path of a light ray changes when it moves into a material with a different index of refraction. According to Snell's law, if a light ray traveling through a medium with index of refraction n₁ hits the boundary of a material with index n₂ at angle , the light path is bent and enters the new material at an angle given by the relation n₁sin = n₂ sin.

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