Light: 3

    Light - Electromagnetic radiation that has a wavelength in the range from about 4,000 (violet) to about 7,700 (red) angstroms and may be perceived by the normal unaided human eye. Light is responsible for sight - without light, the world would obviously be completely dark.

    The most common sources of light are thermal in nature such as the sun or a light bulb.

    Master Concepts List - alphabetical glossary

    Master Concepts List - grouped by category/course