What is light energy? Here we'll learn about the properties of light and how pigments such as chlorophylls absorb light energy.

Explains where visible light fits into the electromagnetic spectrum and the wavelengths for the different colors we see.

NASA related site shows the entire Electromagnetic Spectrum. Provides a brief description of the expansive colored spectrum as well as a related link that provides more details.

In discussing the findings of James Clerk Maxwell and Michael Faraday, this site reveals information and formulas related to electromagnetic radiation and the electromagnetic spectrum.

The dualistic nature of light is discussed. The photoelectric effect and the Davisson-Germer experiment are contrasted as empirical evidence supporting each of the two views - particle and wave - of the nature of light. The photoelectric...

Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site discusses continuous spectra and line spectra using examples and charts to assist in the understanding.

A discussion of ultraviolet light and its interaction with the atmosphere. Describes the UV detectors on a spacecraft which are used to study the UV light emissions from astronomical bodies.

Under the heading, "Cracking the Code of Faraway Worlds" this site explores the uses of spectrum (and spectrograph, spectra) in planetary study. In addition to an image, a description of spectrum and its uses in space science is provided.

Colm Kelleher describes the physics behind colors- why the colors we see are related to the period of motion and the frequency of waves. [3:09]

A short sketch of the life and work of Thomas Young (1773-1829 CE). Traces early upbringing and education and his scientific discoveries and contributions.