# Smith–Purcell effect

> the precursor of the free-electron laser

**Wikidata**: [Q649739](https://www.wikidata.org/wiki/Q649739)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Smith–Purcell_effect)  
**Source**: https://4ort.xyz/entity/smith-purcell-effect


## References

1. [Library of Congress Subject Headings](http://id.loc.gov/authorities/subjects/sh98007973.html)
2. Freebase Data Dumps. 2013
3. National Library of Israel