Steradian The steradian (symbol: sr) is the SI unit of solid angle. It is used to describe two-dimensional angular spans in three-dimensional space,
The SI unit of angle isthe dimensionless radian, which is the plane angle whose arc length is equal to its radius. A full circle has 2Š radians, and common subdivisions include the milliradian (10-3), microradian (10-6), and nanoradian (10-9). Which is the smallest unit of time?
So a full sphere has a surface area of 4π steradians which is about 12.57 steradians. That means one steradian covers roughly 8% of the sphere.And because we are measuring angles, it doesn't matter what size the sphere is it will always measure 4π steradians.Example: The "unit ...
Steradian As of Version 9.0, unit functionality is built into the Wolfram Language» Steradian is a dimensionless measure of solid angle. 更多信息和选项 参见 Radian 技术笔记 Units Package
1)steradian (ster),立体弧度,球面度(立体角单位)2)steradian,球面度(立体角单位)3)Steradian.,球面度,立体弧度4)sterad['steræd],立体弧度5)watt per steradian,瓦/立体弧度6)unit solid angle,单位立体角 英汉例句 The total solid angle of a sphere is 4S{x steradians.See table at measurement ...
The steradian is the solid angle of a cone which, having its vertex in the centre of a sphere, cuts off on the surface of the sphere an area equal to that of a square with sides of length equal to the radius of the sphere Steradian je prostorski kot stožca z vrhom v središ...
Steradian isa unit of measurement for the solid angles. Steradian is the angle subtended, at the center of a sphere, by a surface whose magnitude of area is equal to square of the radius of the sphere. The solid angle of a sphere at it's centre is 4. steradians. ...
A solid angle was defined asa ratio of an area to the square of a length. ... Since 1995 the unit of plane angle is defined as the dimensionless number “one”, equal to the ratio of a meter to a meter, and the unit of solid angle is also dimensionless number “one”, equal to...
Steradian, unit of solid-angle measure in the International System of Units (SI), defined as the solid angle of a sphere subtended by a portion of the surface whose area is equal to the square of the sphere’s radius. Since the complete surface area of a