Snell's Law

Snell's law is a formula used for calculating the angle of incidence and the angle of refraction when light passes from one material into another. If light is travelling from medium 1 to 2, t states that
\frac{\sin{ \theta_{1}}}{\sin{\theta_{2}}} = \frac{n_1}{n_2} = \frac{v_1}{v_2} 
where 
* is the angle of incidence/refraction,
*n is the refractive index,
*v is the velocity of light
Category:Optics