Changes

'''Snell's Law''' describes how the direction of light changes when it moves from one medium to another.  The two forms of the law are: <br />

'''Snell's Law''' describes how the direction of [[light]] changes when it moves from one medium to another.  The two forms of the law are: <br />

<math> n_1 sin(\theta _1) = n_2 sin(\theta _2) </math> <br />

<math> n_1 sin(\theta _1) = n_2 sin(\theta _2) </math> <br />

<math> v_2 sin(\theta _1) = v_1 sin(\theta _2) </math> <br />

<math> v_2 sin(\theta _1) = v_1 sin(\theta _2) </math> <br />

where n1 and n2 are the indices of refraction in medias 1 and 2, respectively, and <math> \theta _1 </math> and <math> \theta _2 </math> is the angle from the normal of the plane dividing the 2 media and the ray.

where n1 and n2 are the indices of [[refraction]] in medias 1 and 2, respectively, and <math> \theta _1 </math> and <math> \theta _2 </math> is the angle from the normal of the [[plane]] dividing the 2 media and the ray.

The index of refraction of a material is inversely proportional to the speed of light in that material, i.e. light will move slower in a material with a high index of refraction than it will in a material with a low index of refraction.

The index of refraction of a material is inversely proportional to the speed of light in that material, i.e. light will move slower in a material with a high index of refraction than it will in a material with a low index of refraction.