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Java applet demonstrating Snell's law showing both reflected and refracted light rays.
The site explains what happen to electromagnetic waves when it is transmitted and come in contact with a boundary.
A simple and effective, interactive example of the birefringence of Iceland Spar, with a clear explanation of the effect.
An interesting page on how sound is refracted and examples of the effect this causes.
This site aims to further our understanding of light and the rainbow.
The vergence of light is defined by where n is the index of refraction of the medium and L is the distance in accordance with the Cartesian sign convention.
Useful information driven site which provides details on how light is refracted (including total internal reflection).
Applet showing refraction of light from medium 1 to medium 2. refractive indices and incident angle can be altered, and total internal reflection demonstrated.
Includes a number of games about light and colour - reflection, spectrum, speed of light, optical illusions and refraction. Teachers notes available.
This colourful ray diagram shows the dispersion of white light by an equilateral triangle prism according to Snell's law. The angle of incidence and width of beam are variable.
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