- pointsource
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point source
n.
A source, especially of pollution or radiation, occupying a very small area and having a concentrated output.
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Universalium. 2010.
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Universalium. 2010.
Light meter — A light meter is a device used to measure the amount of light. In photography, a light meter is often used to determine the proper exposure for a photograph. Typically a light meter will include a computer, either digital or analogue, which… … Wikipedia