Exploratorium
Exploratorium: Black Magic
A great and easy-to-do activity where students separate the colors in a black marker and develop an understanding that black is a composite of other colors.
Exploratorium
Exploratorium: Science Snacks: Cd Spectroscope
Analyze light by creating a CD spectroscope in this activity. See the whole spectrum of light with the spectroscope.
Khan Academy
Khan Academy: Understanding Spectra
This is an 8-problem quiz/practice to increase students' understanding of spectra. Color is a property of light. Test your understanding of this concept and how light can be represented in with a spectral power distribution.
Curated OER
Georgia State University: Color
This site from Georgia State University discusses the location of visible light on the electromagnetic spectrum. Includes the wavelength values for various colors of light within the visible light spectrum.
York University
York University: Color and Color Vision
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.
TeachEngineering
Teach Engineering: Waves Go Public!
Students apply everything they have learned over the course of the associated lessons about waves, light properties, the electromagnetic spectrum, and the structure of the eye, by designing devices that can aid color blind people in...
Optical Society
Optical Society of America: Optics for Kids: What Causes Rainbows?
An experiment to demonstrate how to make a rainbow and why they form.