steradian

IPA: stɛrˈeɪdiʌn

(geometry) In the International System of Units, the derived unit of solid angle; the solid angle subtended at the centre of a sphere of radius r by a portion of the surface of the sphere that has area r². Symbol: sr

Examples of "steradian" in Sentences

The steradian is a unit of measurement for solid angles in three-dimensional space
One steradian is equal to the solid angle subtended by a surface at the center of a sphere with an area of r^2, where r is the radius of the sphere
The steradian is a dimensionless quantity, representing the ratio of the area of a slice of a sphere to the square of its radius
The steradian is used in physics and astronomy to measure the intensity of radiation emitted or received by an object
When measuring luminous intensity, one steradian is equivalent to a cone with an apex angle of one radian on a sphere with a radius of one meter