candela
can·de·la / kanˈdēlə; -ˈdelə/ (abbr.: cd) • n. Physics the SI unit of luminous intensity. One candela is the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012Hz and has a radiant intensity in that direction of 1/683 watt per steradian.
candela
candela (symbol cd) SI unit of luminous intensity. It is defined as 1/60 of the luminous intensity of a black body (which looks black) at atmospheric pressure and the temperature of solidification of platinum, 1772°C (3222°F).
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