| 释义 |
footcandle
Thesaurus| Noun | 1. | footcandle - a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candleillumination unit - a measure of illumination |
footcandle
footcandle[′fu̇t ‚kand·əl] (optics) A unit of illumination, equal to the illumination of a surface, 1 square foot in area, on which there is a luminous flux of 1 lumen uniformly distributed, or equal to the illumination of a surface all points of which are at a distance of 1 foot from a uniform point source of 1 candela; equal to approximately 10.7639 lux. Abbreviated ftc. illuminanceThe density of luminous power, also called illumination. One lumen of luminous flux, uniformly incident on 1 square foot of area, produces an illuminance of 1 footcandle; in SI units, one lumen of luminous flux, uniformly incident on 1 square meter of area, produces an illuminance of 1 lux.footcandle
foot·can·dle (fut'kan-dĕl), Illumination or brightness equivalent to 1 lumen per square foot; replaced in the SI system by the candela.foot·can·dle (fut'kan-dĕl) Illumination or brightness equivalent to 1 lumen per square foot; replaced in the SI nomenclature by the candela. footcandleNon-metric unit of illuminance. It is equal to a flux of 1 lumen per ft2. Symbol: fc. 1 fc = 10.764 lux.FinancialSeefoot-candlefootcandle
Related to footcandle: lumenWords related to footcandlenoun a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candleRelated Words |