This video segment adapted from FRONTLINE introduces the electromagnetic spectrum and explains how the various types of electromagnetic waves are distinguished by the amount of energy each wave carries.

Kids learn about the science of the light spectrum. Wavelengths and frequencies of the electromagnetic waves including visible light, primary colors, and subtractive colors.

Using a student-teacher dialogue format, this page discusses the nature of light as an electromagnetic wave and the electromagnetic spectrum.

NASA site provides information on waves, electromagnetic waves and their wavelengths.

York University provides an index page to several other pages on the topic of color and color vision. The pages are part of an online "book." Many graphics and explanations.

Understand how light moves in small particles in the electomagntic spectrum.