IEVref:845-01-20ID:
Language:enStatus: Obsolete
Term: steradian
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Symbol: sr
Definition: SI unit of solid angle : Solid angle that, having its vertex at the centre of a sphere, cuts off an area of the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere


Publication date:1987
SourceISO 31/1-2.1, 1978
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