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abstraction > mathematical concept > unit > luminous intensity unit > candela
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candela
(cd)
subjectfact 
candelahas symbol cd2001-09-27 09:32:54.0
has approval agency 13th CGPMhas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0
has approval date 1967has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0
has historical origin in 1933 it was based on the luminous emission of a blackbody at the freezing temperature of platinum (2045 K)2001-09-27 09:32:54.0
has definition The SI unit of luminous intensity, defined as "the luminous intensity, in the perpendicular direction, of a surface of 1/600000 square meter of a blackbody at the temperature of freezing platinum under a pressure of 101325 newtons per square meter."has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0
has definition 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 steradian2001-09-27 09:32:54.0
is an instance of luminous intensity unit2001-09-27 09:32:54.0
is an instance of base SI unit2001-09-27 09:32:54.0
luminous intensity unitis a unit of luminous intensity2001-09-27 09:32:54.0
SI unitis an acronym for Syteme Internationale2001-09-27 09:32:55.0
unitrepresents2001-09-27 09:32:42.0