steradian constant

AlternateUnit const steradian

The unit for solid angle quantities (sr).

One steradian is 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. The total solid angle of a sphere is 4*Pi steradians.

Implementation

static const AlternateUnit steradian =
    AlternateUnit('sr', Unit.one, Quantities.solidAngle);