Snell's+Law

=Snell's Law = = = The definition of Snell's law is the principle that the ratio of the sine of the of incidence to the sine of the angle of refraction, which is the constant when a light ray passes from one medium to another. This was named after Willebrord Snell (1591-1626). He was known as a Dutch physicist. In Snell's law the relationship between the angle of incidence and angle of refraction of two materials having a different index of refraction. Meaning that they can be used to calculate either the angles given the index of refraction for the materials, or determine the material based on the angles = Variable:  = n - the two indexes of refraction 0(theta) - the two angles of the ray
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Refraction is the bending of a wave when it enters a medium where it's speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media. The amount of bending depends on the indices of refraction of the two media and is described quantitatively by Snell's Law. Refraction is responsible for image information by lenses and eye.