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."

Use this tool to learn facts about the range of the electromagnetic spectrum, from radio waves to gamma rays.

A gallery of astronomy images which depict galaxies, comets, the moon, planets, nebulae, supernovae as seen in various regions of the electromagnetic spectrum. Each image in the gallery is described. Fascinating!

Reginald Fessenden (1866-1932) was an inventor who worked for a time in Thomas Edison's workshop. His most notable inventions made possible the transmission of audio sounds via radio waves, and included many other radio-related...