Rami Arieli: "The Laser Adventure"

Rami Arieli: "The Laser Adventure" Chapter 1.1.2 page 2

Refraction of Light Beam - Snell Law:

Reducing the velocity of light in matter, and reducing its wavelength, causes refraction of the beam of light.
While crossing the border between two different materials, the light changes its direction of propagation according to the Snell Equation:

You can play with an interactive simulation of Snell's Equation by clicking on Snell's Equation Applet.

This simulation can help you see what happened to light beam when it goes from one medium into another.

After you leaned about Snell's Law, you can practice it by playing with a game that uses Snell's Law of refraction, for hitting a target.
To play the game click on Snell's Game.