释义 |
clay·den effect \ˈklādən-\ noun Usage: usually capitalized C Etymology: after Arthur W. Clayden died 1944 English meteorologist : 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 |