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A spaceship is designed to support animal life for a multiyear voyage to the outer planets of the solar system. Plants will be grown to provide oxygen and to recycle carbon dioxide. Since the spaceship will be too far from the sun for photosynthesis, an artificial light source will be needed. What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?
Trichromatic Theory
A theory of color vision based on the existence of three types of cones in the retina that are most sensitive to blue, green, or red light.
Nobel Prize
A set of international awards given annually in several categories such as Physics, Chemistry, Medicine, Literature, and Peace, to individuals or organizations who have made significant contributions to humanity.
Wavelength
The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave, which is related to the wave's frequency and energy.
Hue
A dimension of color that is determined by the wavelength of light; the term is often used to refer to the name of the color such as red, blue, or yellow.
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