Glossary for Geospatial Science

additive color:� Colors perceived by the human eye that are created by mixing different colors of light, or visible radiation are produced in an additive manner.� The colors of the images produced on a color display screen or by a color projection onto a white screen are examples of additive color.� When all wavelengths, or colors, of visible light are mixed, white light is produced.� That all visible colors are present in white light is easily demonstrated using a prism, which separates white light into the spectrum of colors of which it is composed.� White light can also be produced by mixing complementary colors.� Absence of radiation or relatively low radiation at all wavelengths of human visual sensitivity will yield black.� A predominance of radiation in a particular range of wavelengths will yield a color whose intensity is proportional to the level of radiation.� (See also: subtractive color)