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abstraction > mathematical concept > unit > SI unit > derived SI unit > named derived SI unit > steradian
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steradian
(sr, sr, Ω0)
subjectfact 
steradianhas symbol sr2001-09-27 09:32:47.0
has symbol sr, Ω0has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:47.0
has base unit m2·m-2 = 12001-09-27 09:32:47.0
has approval date 1900has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:47.0
has proposal date 1880has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:47.0
is a unit of solid angle2001-09-27 09:32:47.0
has definition Unit of solid (three-dimensional) angular measure. One steradian is equal to the angle subtended at the centre of a sphere by an area of surface equal to the square of the radius. The surface of a sphere subtends an angle of 4π steradians at its centre.has source: Jerrard, H.G., McNeill, D.B. 1992 Dictionary of Scientific Units, Chapman and Hall, 2001-09-27 09:32:47.0
is an instance of solid angle unit2001-09-27 09:32:47.0
is an instance of named derived SI unit2001-09-27 09:32:47.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0
derived SI unithas unit defined in terms of derived SI unit via a system of quantity equations2001-09-27 09:32:56.0
SI unitis an acronym for Syteme Internationale2001-09-27 09:32:55.0