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Steradian - Wikipedia A steradian can be defined as the solid angle subtended at the centre of a unit sphere by a unit area (of any shape) on its surface For a general sphere of radius r, any portion of its surface with area A = r2 subtends one steradian at its centre
Steradian - Math is Fun A steradian is used to measure solid angles A steradian is related to the surface area of a sphere in the same way a radian is related to the
Steradian | Angle, Solid Angle, Radian | Britannica Steradian, unit of solid-angle measure in the International System of Units (SI), defined as the solid angle of a sphere subtended by a portion of the surface whose area is equal to the square of the sphere’s radius
Steradian in Maths: Meaning, Properties Examples Explained What is a Steradian in Maths? The steradian or square radian is the SI unit of solid angular measure The symbol used to represent steradian is ‘sr’ It is used to measure two-dimensional angular span in three-dimensional space, similar to the radian which quantifies planar angles
Steradian - from Wolfram MathWorld Geometry Trigonometry Spherical Trigonometry Steradian The unit of solid angle The solid angle corresponding to all of space being subtended is steradians
steradian – Metric System The steradian, symbol sr, is the SI coherent derived unit for solid angle One steradian is defined as the solid angle subtended at the centre of a unit sphere by a unit area of its surface For a sphere of radius r, any portion of its surface with area A = r2 subtends one steradian at its centre