An online book about light and color for all ages. Explains the electromagnetic spectrum, visible light, RGB, CMYK, light, and mixing paint colors.

Explains the principles behind the pinhole camera.

Explains principles of reflection, refraction, absorption and transmission to explain how objects are a particular colour.

From NASA, an overview of the different types of electromagnetic waves.

Explains human perception of colour and optical illusions in depth with clear diagrams.

Defines the speed of light and describes how man learned to measure it. Includes interactive quiz.

Includes a section on careers in optics, vision and color, optics in nature, optics and laser lab, and biomedical and health applications.

Java applet exploring reflection and refraction of light beam and laser beam.

Uses geometry to predict reflection from plane and spherical mirrors, and looks at how speed and wavelength varies with different media.