candle foot
11foot-candle — /foot kan dl/, n. Optics. a unit of illuminance or illumination, equivalent to the illumination produced by a source of one candle at a distance of one foot and equal to one lumen incident per square foot. Abbr.: FC Also, footcandle. [1905 10] *… …
12foot-candle — foot′ can dle n. opt a unit equivalent to the illumination produced by a source of one candle at a distance of one foot and equal to one lumen incident per square foot • Etymology: 1905–10 …
13foot-candle — /foot kan dl/, n. Optics. a unit of illuminance or illumination, equivalent to the illumination produced by a source of one candle at a distance of one foot and equal to one lumen incident per square foot. Abbr.: FC Also, footcandle. [1905 10] …
14foot-lambert — /foot lam beuhrt/, n. Optics. a unit of luminance or photometric brightness, equal to the luminance of a surface emitting a luminous flux of one lumen per square foot, the luminance of a perfectly reflecting surface receiving an illumination of… …
15Foot-candle — A foot candle (sometimes foot candle; abbreviated fc, lm/ft², or sometimes ft c) is a non SI unit of illuminance or light intensity widely used in photography, film, television, and the lighting industry. The unit is defined as the amount of… …
16foot candle — (fc or ftc) a traditional unit of illuminance or illumination, defined as the illuminance received by a surface at a distance of one foot from a source of intensity one international candle. The international candle was the predecessor of the… …
17foot-candle — TV A unit of illumination equal to the light emitted by a candle at the distance of one foot. One foot candle equals 10.764 lux. (See lux) …
18foot-candela — /fʊt kænˈdilə/ (say foot kan deeluh) noun a unit of illumination in the imperial system, equivalent to that produced by a standard candle at a distance of one foot; equal to 10.763 91 lux. Symbol: ft cd Also, foot candle …
19foot-candle — noun Date: 1906 a unit of illuminance on a surface that is everywhere one foot from a uniform point source of light of one candle and equal to one lumen per square foot …
20Foot-lambert — A foot lambert or footlambert (fL, sometimes fl or ft L) is a unit of luminance in U.S. customary units and elsewhere. A foot lambert equals 1/pi candela per square foot, or 3.4262591 candelas per square meter (nits). It is named after Johann… …
