Back Steradiaal Afrikaans ستراديان Arabic Estereorradián AST Стэрадыян Byelorussian Стэрадыян BE-X-OLD Стерадиан Bulgarian স্টেরেডিয়ান Bengali/Bangla ཟླུམ་ངོས་ཚད། Tibetan Estereoradian Catalan سترادیان CKB
The steradian (symbol: sr) or square radian is an SI unit. It is like a radian, but for smooth 3D objects, for example, a sphere. A steradian is about one twelfth the surface area of a sphere, regardless of how big the sphere is.[1]
- ↑ Weisstein, Eric W. "Steradian". mathworld.wolfram.com. Retrieved 2020-03-27.