steradian Definition
a unit of solid angle measure equal to the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared.
Using steradian: Examples
Take a moment to familiarize yourself with how "steradian" can be used in various situations through the following examples!
Example
The total solid angle around a point in three-dimensional space is 4π steradians.
Example
The unit of luminous intensity is the candela per steradian.
Summary: steradian in Brief
A 'steradian' [stɛˈreɪdiən] is a unit of solid angle measure, defined as the solid angle subtended at the center of a sphere by an area on the surface of the sphere that is equal to the radius squared. It is used in physics and mathematics to measure the amount of space an object takes up in three-dimensional space.
