A large collection of solar images and information. Includes an illustration and explanation of the refraction of light to form rainbows and other atmospheric illusions.

This website from the Exploratorium provides a demonstration of total internal reflection. The activity uses a fish aquarium to illustrate how a transparent material like water can act as a reflector. The site provides...

This site from the Exploratorium contains a simple demonstration of how objects can disappear when placed in a liquid. The activity uses glass objects and Wesson™ oil. The site provides an explanation of the refraction...

This webpage, from HyperPhysics at Georgia State University, contains an introduction to the Fresnel lens, a design that vastly reduces the amount of glass required for large lenses. The lens is described and diagrams...

This site, hosted by How Stuff Works.com, explains the science behind rainbows, including the bending and refraction of light. Using images and text, the site explains the process step by step, making it very accessible.