Difference between revisions of "Photometer"
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Photometer
</dt>
An instrument for measuring the intensity of
light or the relative intensity of a pair of lights. Also called
illuminometer.
</dd>
If the instrument is designed to measure the intensity of light as a
function of wavelength, it is called a spectrophotometer. Photometers may be
divided into two classes: photoelectric photometers in which a photoelectric
cell is used to compare electrically the intensity of an unknown light with
that of a standard light, and visual photometers in which the human eye is the
sensor. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use
