In mathematics, a reciprocity law is a generalization of the law of quadratic reciprocity. There are several different ways to express reciprocity laws. The early reciprocity laws found in the 19th century were usually expressed in terms of a power residue symbol (p/q) generalizing the quadratic reciprocity symbol, that describes when a prime numb...
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Synonym for Bunsen-Roscoe law ... In two photochemical reactions, e.g., the darkening of a photographic plate or film, if the product of the intensity of illumination and the time of exposure are equal, the quantities of chemical material undergoing change will be equal; the retina for short periods of exposure obeys this law. ... Synonym: reciproc...
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States that exposure = intensity x times, where intensity is equal to the amount of light and time is equal to the time that amount of light is allowed to act upon the photographic emulsion
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http://www.encyclo.co.uk/local/21048
Type: Term Synonyms: Bunsen-Roscoe law
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http://www.medilexicon.com/medicaldictionary.php?t=48244
States that exposure = intensity x times, where intensity is equal to the amount of light and time is equal to the time that amount of light is allowed to act upon the photographic emulsion.
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http://www.rodsmith.org.uk/photographic%20glossary/rods%20photographic%20gl
reciprocity law In photography, the formulation that exposure equals intensity (the amount of light) X time (the time that the light is allowed to act on a photographic emulsion).
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