Luminous intensity
From Biocrawler, the free encyclopedia.
Luminous intensity is a measure of the energy emitted by a light source in a particular direction.
The SI unit of luminous intensity is the candela (cd).
1 cd is that luminous intensity emitted by a monochromatic light source of frequency 540 × 1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian.
| SI light units edit (http://www.biocrawler.com/w/index.php?title=Template:SI_light_units&action=edit) | ||||
|---|---|---|---|---|
| Quantity | SI unit | Symbol | Notes | |
| Luminous energy | lumen seconds | lm · s | lumen seconds are sometimes called Talbots | |
| Luminous flux | lumen or (candela · steradian) | lm | also called Luminous power | |
| Luminous intensity | candela or (lumen / steradian) | cd | ||
| Luminance | candela / square metre | cd/m2 | also called Luminosity | |
| Illuminance | lux or (lumen / square metre) | lx | ||
| Luminous efficiency | lumens per watt | lm/W | ||
[edit]
See also
it:Intensit luminosa ja:光度 nl:Lichtsterkte pl:Światłość sl:svetilnost zh:发光强度
