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.

This article provides information on the theory of operation and terminology associated with optical light curtains. The site is produced by Omron, and provide crucial safety tips about the process of using this...

Refraction is an important behavior of light that can be used to explain the operation of lenses, prisms, and optical fiber, as well as natural phenomena such as rainbows and mirages. The index of refraction, or...

In this video from the ICT Center, learn about the index of refraction and Snell’s law. Review a simple example of refraction, the speed of light in materials, and the formula for calculating the index of refraction....

This educational poster contains images and information about what the universe looks like in the infrared. The back contains nine 8.5 in. x 11 in. panels that explain what infrared light is and why infrared astronomy is...