Candela meaning

kăn-dĕlə
A unit of measurement of the intensity of a light source, such as a light bulb. The candela rates the light source itself; however, the intensity of light radiating from that source is measured in "lumens." Part of the SI system of measurement, one ordinary wax candle generates approximately one candela (one cd). The term candela means "candle" in Latin, but the measurement was originally defined in the mid-1800s as "candlepower." See lumen, lux, nit and SI.
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The SI unit of luminous intensity equal to160 of the luminous intensity per square centimeter of a blackbody radiating at the temperature of solidification of platinum (2,046 K).
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The basic unit of luminous intensity in the SI system, now defined as the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 x 1012 hertz and that has a radiant intensity in that direction of1683 watt per steradian.
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Designating a style of cigar with a greenish wrapper.
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The SI unit used to measure the brightness of a source of light (its luminous intensity). By definition, one square centimeter of a blackbody at the freezing point of platinum emits one-sixtieth of a candela of radiation.
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The basic SI unit of luminous intensity. The standard originally was based on the light emission of a candle flame, then as the glow from molten platinum, but then things got more complicated. In contemporary SI terms, the candela is the luminous intensity, in the perpendicular direction, of an area of 1 / 600,000 square meter of a blackbody radiator at the temperature of freezing platinum (2,045 Kelvin), under a pressure of 101,325 newtons per square meter. One candela emits 4 lumens of light flux. For more information, get a degree in electrical engineering or physics, just like the person who came up with this way too complicated, but delightfully precise, measurement. See also luminance and SI.
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In the International System of Units, the base unit of luminous intensity; the luminous intensity, in a given direction, of a source that emits monochromatic radiation of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. Symbol: cd.
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Origin of candela

  • Latin candēla candle candle

    From American Heritage Dictionary of the English Language, 5th Edition