This article is about photometric light intensity. For other types of light intensity, see Light intensity (disambiguation).
luminous intensity
Common symbols
Iv
SI unit
candela
Other units
candlepower
Hefnerkerze
In SI base units
cd
Dimension
In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit of luminous intensity is the candela (cd), an SI base unit.
and 23 Related for: Luminous intensity information
In photometry, luminousintensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle...
One lumen is defined as the luminous flux of light produced by a light source that emits one candela of luminousintensity over a solid angle of one steradian...
/kænˈdiːlə/; symbol: cd) is the unit of luminousintensity in the International System of Units (SI). It measures luminous power per unit solid angle emitted...
are commonly known as intensity: Radiant intensity, a radiometric quantity measured in watts per steradian (W/sr) Luminousintensity, a photometric quantity...
perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance. In SI...
Luminance is a photometric measure of the luminousintensity per unit area of light travelling in a given direction. It describes the amount of light that...
column denote dimensions; "L", "T" and "J" are for length, time and luminousintensity respectively, not the symbols for the units litre, tesla and joule...
System of Units (SI). The unit is based on the candela, the SI unit of luminousintensity, and the square metre, the SI unit of area. The nit (symbol: nt) is...
thermodynamic temperature), mole (mol, amount of substance), and candela (cd, luminousintensity). The system can accommodate coherent units for an unlimited number...
cd, is the SI unit of luminousintensity in a given direction. It is defined by taking the fixed numerical value of the luminous efficacy of monochromatic...
Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt...
produces light with about 1 candela of luminousintensity in all directions. A lamp can produce higher luminousintensity either by producing more light, or...
sometimes called current intensity in older books Radiant intensity, power per unit solid angle (W/sr) Luminousintensity, luminous flux per unit solid angle...
temperature, the mole for amount of substance, and the candela for luminousintensity. The SI base units are a fundamental part of modern metrology, and...
The lux (symbol: lx) is the unit of illuminance, or luminous flux per unit area, in the International System of Units (SI). It is equal to one lumen per...
(abbreviated as cp or CP) is a unit of measurement for luminousintensity. It expresses levels of light intensity relative to the light emitted by a candle of specific...
"λ". Directional quantities are denoted with suffix "Ω". Candela Luminousintensity "Thermal insulation — Heat transfer by radiation — Physical quantities...
In photometry, luminous energy is the perceived energy of light. This is sometimes called the quantity of light. Luminous energy is not the same as radiant...
the luminousintensity, all other photometric units are derived from the candela. Luminance for instance is a measure of the density of luminous intensity...
connected to the modern (1979) definition of the candela, the unit of luminousintensity. This arbitrary number made the new definition give numbers equivalent...
directions, the total radiant flux would be only about 18.40 mW. The luminousintensity of a typical candle is approximately one candela. The SI unit, candela...
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