Clayden effect

noun

Clay·​den effect

ˈklādᵊn-

: partial desensitization of the emulsion layer of a photographic material by an initial high-intensity exposure of very short duration so that a later exposure of lower intensity and longer duration produces less effect than expected from the combined exposures, sometimes resulting in reversal of an image compare dark lightning

Word History

Etymology

after Arthur W. Clayden †1944 English meteorologist

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