reciprocity law


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Related to reciprocity law: Quadratic reciprocity law

Bun·sen-Ros·coe law

(bŭn'sĕn ros'kō),
in two photochemical reactions, for example, 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.

reciprocity law

Any milliamperage multiplied by an exposure time setting that gives the same milliamperage-second outcome should give the same relative density to an image. However, this law is dramatically affected by the image receptor response curve, esp. when it is not a 45° linear curve. In radiographic intensifying film and screen technologies, the reciprocity law does not hold at long exposure times because of the reversal of the D log E response curve.
See also: law

Bunsen,

Robert W., German chemist and physicist, 1811-1899.
Bunsen burner - a gas lamp giving a very hot but only slightly luminous flame.
Bunsen solubility coefficient - the milliliters of gas STPD dissolved per milliliter of liquid and per atmosphere (760 mmHg) partial pressure of the gas at any given temperature.
Bunsen-Roscoe law - in two photochemical reactions, 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. Synonym(s): reciprocity law; Roscoe-Bunsen law
Roscoe-Bunsen law - Synonym(s): Bunsen-Roscoe law
References in periodicals archive ?
We have examples of similar reciprocity laws elsewhere in the world that first came with loopholes but were later solved.
The reciprocity law is obeyed if the photodegradation of the material is dependent only on the total energy of UV exposure (irradiance x time) and is independent of the irradiance time, geometry, chamber, environment, etc.
Putting a = 0 in Equation (4), we obtain the reciprocity law for the theta function, viz,
One of the first experiments to be carried out on the SPHERE was to ascertain the relationship between the UV irradiance and the photoresponse of a polymeric system, and to subsequently determine whether the reciprocity law is valid for this particular material.
The objectives of this study were to (1) ascertain the relationship between the level of applied UV irradiance in a laboratory device and the photoresponse of a model acrylicmelamine polymer, and (2) to determine whether the reciprocity law is valid for this particular polymeric system.
More recently, however, the California ABC ruled that Washington's reciprocity law was so different from California's law as not to be reciprocal.
ySTANBUL (CyHAN)- The law enabling foreign citizens to buy property in Turkey is known as the reciprocity law and was passed by Parliament in May.
Moreover, we have successfully constructed a special case of higher epsilon-factors, called higher-dimensional Contou-Carrre symbols, and established an array of reciprocity laws for this case.
In Arlington, expect to see increased demand from technology and consulting firms, as well as potential demands from law firms if reciprocity laws change to allow Washington, DC lawyers to practice in Virginia.
The spread of reciprocity laws has greatly eased restrictions on law-abiding citizens who travel with their firearms.
In California, SB 118 represents the next step suggested in Justice Kennedy's majority opinion, that reciprocity laws for wine producers are barriers to interstate commerce," said Jim Richards, FWC chair and co-owner of Paloma Vineyard in St.