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Pronunciation: bŭn′sĕn ros′kō
Definition: in two photochemical reactions, the darkening of a photographic plate or film, if the products of the intensity of illumination and the time of exposure are equal, the quantities of chemical material undergoing change will also be equal; the retina for short periods of exposure obeys this law.
Synonym(s): reciprocity law, Roscoe-Bunsen law
Examples: glitazone, GI cocktail, etc.
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