University of Colorado
University of Colorado: Physics 2000: Electromagnetic Waves
Using a student-teacher dialogue format, this page discusses the nature of light as an electromagnetic wave and the electromagnetic spectrum.
PBS
Pbs Learning Media: Light Waves: Interactive Lesson
Light is all around you, with wavelengths bigger than mountains and smaller than atoms. Learn about light waves, and the ways in which light interacts with matter, with this lesson plan.
My Science Site
Electromagnetic Spectrum: Colour and Waves
This resource provides information on the different wavelengths that make up the electromagnetic spectrum. Also contains information on waves and color.
Exploratorium
Exploratorium: Bubbularium
What colors do you see in a bubble? Why do you see colors in a bubble? Use this site to find out the answer to these questions with this easy experiment.