Difference between revisions of "Intensity"
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Intensity
</dt>
1. In general, the degree or amount, usually expressed by the elemental
time rate or spatial distribution of some condition or physical quantity, such
as electric field, sound, magnetism, etc.
</dd>
2. With respect to electromagnetic
radiation, a measure of the radiant
flux per unit solid angle emanating for some source. Frequently, it is
desirable to specify this as radiant intensity in order to distinguish
it clearly for luminous intensity. Compare emittance.
</dd>
Occasionally, intensity, is used as synonymous to flux density. This
usage does not coincide with accepted photometric and radiometric usage, but
is of long standing in meteorology. See sound
intensity.
</dd>
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
