An educational site devoted to the study of radio signals in our environment. The project seeks schools, classrooms, and individual students and teachers who are willing to participate in the collection and analysis of radio signal data....

This is a very simple and cheap device that demonstrates that mobile phones generate radio waves.

What is electromagnetic radiation and how does it work? Review a captioned graphic that explains electromagnetic radiation and the visible and invisible types of radiation on the electromagnetic spectrum.

A solid summary from the University of Oregon of the work of James Maxwell Clerk, Michael Faraday, and others in the field of electric and magnetic phenomena. This is a fine essay.

This lesson will introduce the electromagnetic spectrum and the properties and uses of the waves it contains. It is 2 of 4 in the series titled "Electromagnetic Spectrum."

This lesson will introduce the electromagnetic spectrum and the properties and uses of the waves it contains. It is 3 of 4 in the series titled "Electromagnetic Spectrum."

This lesson will introduce the electromagnetic spectrum and the properties and uses of the waves it contains. It is 4 of 4 in the series titled "Electromagnetic Spectrum."

This lesson will introduce the electromagnetic spectrum and the properties and uses of the waves it contains. It is 1 of 4 in the series titled "Electromagnetic Spectrum."

This site from NASA provides an interesting approach to the subject. How do messages travel in space and how do we intercept those messages on Earth? Find out the answers as well as find out how NASA's giant dish antennas work.

Site provides the article, "NASA Detects One Of Closest And Brightest Gamma Ray Bursts." Provides links to learn more about gamma rays and black holes as well as other resources.

Here is a 1-5 day unit on electromagnetic radiation that features a teacher guide and student activities with extensions.