Science Fair Project Encyclopedia
Luminous intensity
Luminous intensity is a measure of the energy emitted by a light source in a particular direction.
The SI unit of Luminous intensity is the candela (cd).
1 cd is that luminous intensity emitted by a monochromatic light source of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.
See also
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details