# paraxial approximation

> small angle approximation in geometric optics

**Wikidata**: [Q1071734](https://www.wikidata.org/wiki/Q1071734)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Paraxial_approximation)  
**Source**: https://4ort.xyz/entity/paraxial-approximation


## References

1. Freebase Data Dumps. 2013
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)