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"double refraction of light"
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Applet showing refraction of light from medium 1 to medium 2. refractive indices and incident angle can be altered, and total internal reflection demonstrated.
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.
Applet in two parts - the first a fish's view from under water. In the second the position of the cursor is the source of a light ray. Its path from within the water to an observer appears.
An animated wave diagram showing how an incident wave is refracted for a variety of angles of incidence, and a variety of materials.
A Marvin and Milo activity about light, refraction and lenses. All you need is sticky tape, water, teaspoon and some clear plastic.
A java applet that lets you investigate reflection and refraction. One of a series of simple applets that are good for display use in the classroom.
An experiment in mixing different coloured lights.
A summarised view of how the aurora is formed.
The light tour will let you discover information about light in the universe and how astronomers make use of light wavelengths.
This site contains a number of shockwave animations showing that you can make pictures using coloured lights and filters.
Showing 21 - 30 of 284