candela | has symbol cd | ![2001-09-27 09:32:54.0 2001-09-27 09:32:54.0](facet.gif) |
has approval agency 13th CGPM | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0](facet.gif) |
has approval date 1967 | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0](facet.gif) |
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 2001-09-27 09:32:54.0](facet.gif) |
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 source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:54.0](facet.gif) |
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 steradian | ![2001-09-27 09:32:54.0 2001-09-27 09:32:54.0](facet.gif) |
is an instance of luminous intensity unit | ![2001-09-27 09:32:54.0 2001-09-27 09:32:54.0](facet.gif) |
is an instance of base SI unit | ![2001-09-27 09:32:54.0 2001-09-27 09:32:54.0](facet.gif) |
luminous intensity unit | is a unit of luminous intensity | ![2001-09-27 09:32:54.0 2001-09-27 09:32:54.0](facet.gif) |
SI unit | is an acronym for Syteme Internationale | ![2001-09-27 09:32:55.0 2001-09-27 09:32:55.0](facet.gif) |
unit | represents | ![2001-09-27 09:32:42.0 2001-09-27 09:32:42.0](facet.gif) |