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In radiometry, radiant intensity is a measure of the intensity of electromagnetic radiation. It is defined as power per unit solid angle. The SI unit of radiant intensity is watts per steradian (W·sr-1). It is distinct from intensity defined by irradiance or radiant exitance which measure radiation directed at or emitted from a given surface area.
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|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Radiant_intensity". A list of authors is available in Wikipedia.|