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Candela (CD) Skilgreining eininga
The candela is the unit of luminous intensity in the International System of Units (SI). It measures luminous power per unit solid angle emitted by a light source in a particular direction. The candela is represented by the symbol cd.
Luminous intensity is analogous to radiant intensity, but instead of simply adding up the contributions of every wavelength of light in the source's spectrum, the contribution of each wavelength is weighted by the luminosity function. This is the model of the sensitivity of the human eye to different wavelengths, standardized by the CIE and ISO.
A common wax candle emits light with a luminous intensity of approximately one candela. If emission in some directions is blocked by an opaque barrier, the emission would still be approximately one candela in the directions that are not obscured.
The word candela is Latin for candle. The old term "candle" is still sometimes used, as in foot-candle and the more modern definition of candlepower.
SI Multiples
A table of various luminous intensity candela units derived from SI multiples:
Submultiples |
Multiples |
||||||
Scientific Notation |
Gildi |
Forskeyti |
Nafn |
Scientific Notation |
Gildi |
Forskeyti |
Nafn |
10-1 cd |
0.1 cd |
Deci (D) | Decicandela (DCD) | 101 cd |
10 cd |
DECA (DA) | Decacandela (DACD) |
10-2 cd |
0.01 cd |
Centi (c) | Centicandela (CCD) | 102 cd |
100 cd |
Hecto (h) | Hectocandela (HCD) |
10-3 cd |
0.001 cd |
Milli (m) | Millicandela (MCD) | 103 cd |
1000 cd |
Kíló (k) | Kilocandela (KCD) |
10-6 cd |
0.000001 cd |
Micro (µ) | Microcandela (µcd) | 106 cd |
1000000 cd |
Mega (m) | Megacandela (MCD) |
10-9 cd |
0.000000001 cd |
Nano (n) | Nanocandela (NCD) | 109 cd |
1000000000 cd |
Giga (g) | Gigacandela (GCD) |
10-12 cd |
0.000000000001 cd |
Pico (P) | Picocandela (PCD) | 1012 cd |
1000000000000 cd |
Tera (t) | Teracandela (TCD) |
10-15 cd |
0.000000000000001 cd |
Femto (f) | Femtocandela (FCD) | 1015 cd |
1000000000000000 cd |
Peta (P) | Petacandela (PCD) |
10-18 cd |
0.000000000000000001 cd |
Atto (a) | Attocandela (ACD) | 1018 cd |
1000000000000000000 cd |
Exa (e) | Exacandela (ECD) |
10-21 cd |
0.000000000000000000001 cd |
Zepto (z) | Zeptocandela (ZCD) | 1021 cd |
1000000000000000000000 cd |
Zetta (z) | Zettacandela (ZCD) |
10-24 cd |
0.000000000000000000000001 cd |
Yocto (y) | Yoctocandela (YCD) | 1024 cd |
1000000000000000000000000 cd |
Yotta (y) | Yottacandela (ycd) |
10-27 cd |
0.000000000000000000000000001 cd |
Ronto (r) | Rontocandela (rcd) | 1027 cd |
1000000000000000000000000000 cd |
Ronna (R) | Ronnacandela (Rcd) |
10-30 cd |
0.000000000000000000000000000001 cd |
Quecto (q) | Quectocandela (qcd) | 1030 cd |
1000000000000000000000000000000 cd |
Quetta (Q) | Quettacandela (Qcd) |
Other Luminous Intensity Unit Definitions
- Attocandela (ACD)
Bougie Decimal (B)
- Candela (CD)
Kerti Þýskaland (kerti)
Candle International (kerti)
Kerti nýtt (kerti)
Candlepower (CP)
Candlepower gamall (CP)
Carcel Unit (Carcel-Unit)
- Centicandela (CCD)
- Decacandela (DACD)
- Decicandela (DCD)
Aukastaf (DC)
- Dekacandela (dacd)
- Exacandela (ECD)
- Femtocandela (FCD)
- Gigacandela (GCD)
- Hectocandela (HCD)
Hefner eining (HK)
- Kilocandela (KCD)
Holrými á steradian (LM/SR)
- Megacandela (MCD)
- Microcandela (μcd)
- Millicandela (MCD)
- Nanocandela (NCD)
Pentane kerti (PC)
- Petacandela (PCD)
- Picocandela (PCD)
- Quectocandela (qcd)
- Quettacandela (Qcd)
- Ronnacandela (Rcd)
- Rontocandela (rcd)
- Teracandela (TCD)
Fiðla (fjólul)
- Yoctocandela (YCD)
- Yottacandela (ycd)
- Zeptocandela (ZCD)
- Zettacandela (ZCD)
Convert to Another Luminous Intensity Unit
Tengdar skilgreiningar
Fyrirvari
Þó að allt hafi verið lagt á að prófa þessa einingu breytir, þá erum við ekki að vera ábyrg fyrir neinu sérstöku, tilfallandi, óbeinum eða afleiðingum tjóns eða peningalegum tap og upplýsingar fengnar af þessari vefsíðu. Þessi eining breytir er veitt sem þjónusta við þig, vinsamlegast notaðu á eigin ábyrgð. Ekki nota útreikninga fyrir neitt þar sem manntjón, peningar, eignir osfrv. Gætu stafað af ónákvæmum viðskiptum.
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Heimildir
“Candela.” Wikipedia, Wikimedia Foundation, 4 Sept. 2023, en.wikipedia.org/wiki/Candela.