TY - JOUR
AU - Goddard, S. C.
AB -  Since the time of Bunsen photochemical systems have been used to measure light and other forms of radiation. The amount of radiation falling on the system is measured by the disappearance of the reactants or by the formation of a reaction product. The photographic emulsion is a special kind of such a system. A so-called latent image is formed by the action of the light on the silver halide crystals, and on development by a suitable reducing agent the crystals are converted into black metallic silver following the distribution of the latent image. Owing to this ‘magnifying’ action of the developer, minute quantities of light will give rise to a measurable image on the plate. Moreover, the effect is cumulative, and light of too low an intensity to register an image in a short exposure will give an image when the exposure is increased suiliciently. Given standardized methods of development there is, within certain limits, a definite relationship between the amount of radiation falling on a photographic material and the optical density of the image produced. There is no need to wony about the actual quantity of silver produced, because for each material a characteristic curve can be 
TI - PHOTOGRAPHY AND METEOROLOGY—II
JF - Weather
DO - 10.1002/j.1477-8696.1954.tb01744.x
DA - 1954-03-01
UR - https://www.deepdyve.com/lp/wiley/photography-and-meteorology-ii-2W5Yl6XZ80
SP - 74
VL - 9
IS - 3
DP - DeepDyve
ER -