NASA
Nasa: The Space Place: Why Is the Sky Blue?
Learn about colors of light by exploring how prisms work. Discover the different colors of the spectrum and how the visible light is what we see.
University Corporation for Atmospheric Research
Ucar: Blue Skies and Red Sunsets
Find out how some wavelengths of light are scattered more than others producing blue skies and red sunsets.
Physics Classroom
The Physics Classroom: Color Addition
This tutorial on the addition of color to light discusses the primary, complimentary, and secondary colors of light.
University of Texas at Austin
The University of Texas Mc Donald Observatory: Color of Stars
Students observe colors in the flame of a burning candle to explore connections between matter, light, color, and temperature, the basic concepts of matter and energy.