Luminous intensity with which 1/60 square centimetre of a black radiator glows at the setting temperature of platinum.
Unit of illumination (cd). 1 cd is 1/683W per steradian.
A measure of luminous intensity.
unit for luminous intensity as related to human eye spectral response
a measurement of the intensity of light, used in the International Standard (SI) measurement system
a measure of lumens per three-dimensional angle, known by mathematicians as a steradian
a unit of measurement of the intensity of light
The measure of luminous intensity of a source in a given direction. The term has been retained from the early days of lighting when a standard candle of a fixed size and composition was defined as producing one candela in every direction. A plot of intensity versus direction is called a candela distribution curve and is often provided for reflectorized lamps and for luminaires with a lamp operating in them.
The luminous intensity as defined by the international metric standard (SI). The term, retained from the early days of lighting, defines a standard candle of a fixed size and composition as a basis for evaluating the intensity of other light sources.
A unit of luminous intensity; the magnitude to the candela is such that the luminance of the total radiator, at the temperature of solidification of platinum, is 60 candelas per square centimeter.
cd]. A unit for measuring luminous intensity. One candela is approximately equal to the amount of light energy generated by an ordinary candle. Since 1948 a more precise definition of a candela has become: the luminous intensity of a black body heated up to a temperature at which platinum converges from a liquid state to a solid.
The candela ( abbreviation, cd) is the standard unit of luminous intensity in the International System of Units. Originally, luminous intensity was measured in terms of units called candles. This was based on the approximate amount of light emitted by a candle flame. Late in the 20th century, the current definition and terminology was adopted to allow for consistent and repeatable measurements of light. The term candela also refers to candle power, 1 candela = 1 candlepower. Candela is formally defined as the magnitude of an electromagnetic field, in a specified direction, that has a power level of 1/683 watt (1.46 x 10-3 W) per steradian at a frequency of 540 terahertz (540 THz or 5.40 x 1014 Hz).
The unit of measure indicating the luminous intensity (candlepower) of a light source in a specific direction; any given light source will have many different intensities, depending upon the direction considered.
The unit of measurement in which luminous intensity is calculated.
Unit of light intensity (SI), roughly equivalent to 12.57 lumens
A unit of luminous intensity equal to 1/60th of the normal intensity of one square centimeter of a blackbody radiating at the temperature of solidification of platinum.
International unit of luminance measurement (1 candela per square meter = 0.2919 footlamberts).
A unit of luminous intensity in a given direction, equal to one lumen per steradian.
the SI (Système International) unit for luminous intensity.
This is the initial unit of light specification. It is the luminous intensity. One candela is defined as a small white-hot cavity. It is actually equal to about 1 large wax candle. (Hence candela / candle).
Unit of luminous intensity, describing the intensity of a light source in a specific direction.
Unit of luminous intensity. One candela equals one lumen per steradian.
the S.I. unit of luminous intensity. One candela is defined as the luminous intensity of 1/60cm2 of a black body radiator operating at the temperature of solidification of platinum. Also called candle.
A measurement of directional light/intensity from a point source.
a new unit which replaces the candle and is a measurement of luminous intensity
The candela is 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. The number 683 makes the value identical to that obtained with the previous version of the unit: the emission from 1 square centimeter of glowing, solidifying platinum. See also Cd/m2.
The international unit (SI) of luminous intensity. The term has evolved from considering a standard candle, similar to a plumber's candle, as the basis of evaluating the intensity of other light sources. Sometimes the term "candlepower" is used to describe the relative intensity of a source. (See Lumen.)
Metric unit for luminous intensity. The unit used to express the intensity of light visible to the human eye. It corresponds to the emission from 1/60th of a square centimeter of a black body operating at the solidification temperature of platinum, and emitting one lumen per steradian.
The unit of measure for the intensity of light at the source roughly equal to the amount of light in any direction from the flame of a candle.
The basic unit of measurement of luminous intensity from a light source in a specific direction.
The international unit (SI) of luminous intensity. The term has been retained from the early days of lighting when a standard candle of a fixed size and composition was used as a basis for evaluating the intensity of other light sources. Sometimes the term "candle power" is used to describe the relative intensity of a source.
In the International System of Units (SI), the candela is the base unit of measuring luminous intensity.
A unit of luminous intensity, equal to 1/60 of the luminous intensity of a square centimeter of a black body heated to 1773.5 degrees Celsius.
A unit of measurement of light intensity of light. An ordinary wax candle generates one candela. More precisely, candela is the luminous intensity of a monochromatic source which has a frequency of 540x1012 Hz. A typical LED bulb's brightness is measured in millicandela or mcd, while a LED display's brightness is measured in NIT.
The luminous intensity emitted by a light source. One candela emits one lumen per steradian.
The SI unit of luminous intensity, equal to one lumen per steradian.
A unit of measurement for the luminous intensity of a lamp at a specific spot in the beam. Dichroic A glass reflector and bulb assembly that allows heat to dissipate through the reflector and away from the bulb thus increasing bulb life.
Abbr. cd. A unit of luminous intensity equal to 1/60 of the luminous intensity per square centimeter of a blackbody radiating at the solidification temperature of platinum. Also called "candle" or "standard candle" or "new candle".
unit which expresses the luminous intensity of a light source.
The unit of measurement of luminous intensity of a light source in a given direction
A unit of luminous intensity in a light beam.
An international unit of luminous intensity; also called a Candle.
The candela (symbol: cd) is the SI base unit of luminous intensity (that is, power emitted by a light source in a particular direction, with wavelengths weighted by the luminosity function, a standardized model of the sensitivity of the human eye).