Spectrum
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Spectrum
</dt>
1. In physics, any series of energies arranged according to wavelength
(or frequency).
</dd>
2. The series of images produced when a beam of radiant
energy is subject to dispersion.
</dd>
3. Short for electromagnetic
spectrum or for any part of it used for a specific purpose as the radio
spectrum (10 kilocycles to 300,000 megacycles).
</dd>
4. In mathematics, = function.
</dd>
5. In acoustics, the distribution of effective sound
pressures or intensities measured as a function of frequency in specified
frequency bands. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use