# 17-21-109

solid angle, <of an area subtended at a point>

Ω ; ω

area intercepted on a unit sphere, centred at the point, by a cone having the given area as its base and the point as its vertex

Note 1 to entry: The solid angle is expressed in steradian (sr).

Note 2 to entry: This entry was numbered 17-1201 in CIE S 017:2011.

Publication date: 2020-12