This Florida State University page introduces light as an electromagnetic wave and discusses the frequency and wavelength range of the various regions of the electromagnetic spectrum. Includes links to some interactive Java applets.

This site contains a definition for what an inductor is, has a drawing of what a conductor looks like and of the symbol for an inductor, and distinguishes between the three types of inductor core types used for audio.

Do you have an idea that you want to share? This step-by-step guide will show you how to create your own web page.

A look at the transition metal unununium, which was renamed roentgenium in 2004. Includes basic information, including symbol, number, mass, melting and boiling points, and numbers of protons, electron, and neutrons.