# solid angle

> measure of a subtended portion of a sphere, used to describe the apparent size of items in a three-dimensional field of view

**Wikidata**: [Q208476](https://www.wikidata.org/wiki/Q208476)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Solid_angle)  
**Source**: https://4ort.xyz/entity/solid-angle


## References

1. ISO 80000-1:2009 Quantities and units—Part 1: General
2. Freebase Data Dumps. 2013
3. ISO 80000-3:2006 Quantities and units — Part 3: Space and time
4. ISO 80000-3:2019 Quantities and units — Part 3: Space and time
5. SI Brochure (9th edition): Concise summary
6. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)