Hi, what do you want to do?
Khan Academy
Khan Academy: Waves and Optics: Refraction and Snell's Law
A video lecture discussing refraction and Snell's Law. Learn about the bending of a light's path as it travels through different mediums. Understand what causes refraction and how to calculate the angle of refraction. [14:23]
Khan Academy
Khan Academy: Refraction and Snell's Law
This article from Khan Academy provides information about refraction and Snell's Law. This information is intended for high school physics.