Solid angleUnits Type ⤴
The solid angle subtended by a surface S is defined as the surface area of a unit sphere covered by the surface S's projection onto the sphere. A solid angle is related to the surface of a sphere in the same way an ordinary angle is related to the circumference of a circle. Since the total surface area of the unit sphere is 4*pi, the measure of solid angle will always be between 0 and 4*pi.
Term
solidAngle
Category
Space and Time
Provenance
QUDT
Provenance Uri
http://qudt.org/vocab/quantity#Solidangle
Note

Default Unit
Steradian (sr)
Dimension Symbol
U1
Dimension Length
1
Dimension Mass
0
Dimension Time
0
Dimension Current
0
Dimension Temperature
0
Dimension Amount
0
Dimension Light
0