Snell's law
Snell's law (also known as the Snell–Descartes law, the ibn-Sahl law, and the law of refraction) is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves passing through a boundary between two different isotropic media, such as water, glass, or air.
Snell's law - Wikipedia Jump to content From Wikipedia, the free encyclopedia Formula for refraction angles Refraction of light at the interface between two media of different refractive indices , with 2</sub> > ''n''<sub>1</sub>"}},"i":0}}]}'> n 2 > n 1 . Since the velocity is lower in the second medium ( 2</sub> < ''v''<sub>1</sub>"}},"i":0}}]}'> v 2 < v 1 ), the angle of refraction 2</sub>"}},"i":0}}]}'> θ 2 is less than the angle of incidence 1</sub>"}},"i":0}}]}'> θ 1 ; that is, the ray in the higher-index medium is closer to the normal. Snell's law (also known as the Snell–Descartes law
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