File:Angle_solide_coordonnees.svg · Wikimedia Commons · See Wikimedia Commons
Also known as Ω, solid angular measure
measure of a subtended portion of a sphere, used to describe the apparent size of items in a three-dimensional field of view
Key facts
- Common symbols
- Ω
- Si unit
- steradian
- Other units
- Square degree , spat
- In si base units
- m /m
- Conserved
- No
- Derivations from other quantities
- Ω = A / r 2 {\displaystyle \Omega =A/r^{2}}
- Dimension
- 1 {\displaystyle 1}
via Wikipedia infobox
Wikidata facts
- Image
- Steradian.svg
Show 6 more facts
- different from
- angular measure
- Commons category
- Solid angle
- recommended unit of measurement
- 1
- studied by
- solid geometry
- maintained by WikiProject
- WikiProject Mathematics
- Stack Exchange tag
- math.stackexchange.com/tags/solid-angle
Sources (2)
via Wikidata · CC0
Article · 中文
立体角，常用字母Ω表示，是一个物体对特定点的三维空间的角度，是平面角在三维空间中的类比。它描述的是站在某一点的观察者测量到的物体大小的尺度。例如，对于一个特定的观察点，一个在该观察点附近的小物体有可能和一个远处的大物体有着相同的立体角。 锥体的立体角大小定义为，以锥体的顶点为球心作球面，该锥体在球表面截取的面积与球半径平方之比，单位为球面度（sr）。一個球體即是4π，半球即是2π。
Abstract from DBpedia / Wikipedia · CC BY-SA