candela

• Substantivo que designa a unidade básica do SI de intensidade luminosa, definida como a potência luminosa por unidade de ângulo sólido emitida por um corpo negro a temperatura de solidificação da platina; também usada como medida de brilho.

A noun referring to the SI base unit of luminous intensity, defined as the luminous power per unit solid angle emitted by a black body at the temperature of freezing platinum.

1. C2formalscientific

   The base unit of luminous intensity in the International System of Units (SI), defined as the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540 × 10¹² hertz and has a radiant intensity in that direction of 1/683 watt per steradian.

   Unidade de intensidade luminosa

   • The candela is one of the seven base SI units.
   • Modern light bulbs are often rated in lumens, which are derived from candela.
   • The standard candle was historically used as a reference for the candela.