" /> Steradian - CISMeF





Preferred Label : Steradian;

NCIt synonyms : str;

NCIt related terms : sr;

NCIt definition : A SI derived unit of solid angle measurement. One steradian is the solid angle that, having its vertex in the center of a sphere, cuts off an area on the surface of the sphere equal to that of a square with sides of length equal to the radius of the sphere. It is equal to 0.25 of the solid angle around a point, 0.07958 sphere, 0.15916 hemisphere, 0.6366 spherical right angle, 3,282.8 square degrees. The solid angle corresponding to all of space being subtended is 4pi steradians.;

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28/07/2025


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