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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.
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.
An animated wave diagram showing how an incident wave is refracted for a variety of angles of incidence, and a variety of materials.
Willebrod Snell (1580 - 1616) is best known for his discovery of the law of refraction which became the basis of modern geometric optics.
A Marvin and Milo activity about light, refraction and lenses. All you need is sticky tape, water, teaspoon and some clear plastic.
An in depth guide to light, optics and colour, covering wave particle duality, reflection, refraction, waves, diffraction, polarisation, birefringence, colour temperature, human perception and more.
A simple, clear site exploring some of the effects of refraction at the water/air boundary. Straightforward site, with clear explanation and neat animations on some links.
A Marvin and Milo activity about refraction and lenses. All you need is a glass of water, a piece of paper and a marker pen.
A Marvin and Milo activity about refraction. All you need is a coin, mug, jug of water, two people and some Blu Tack.
Ths animation shows how waves are reflected and refracted at the boundary between two media. The media can be changed and the speed of the animation also.
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