# hydrogen line

> spectral line of hydrogen state transitions

**Wikidata**: [Q1406191](https://www.wikidata.org/wiki/Q1406191)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hydrogen_line)  
**Source**: https://4ort.xyz/entity/hydrogen-line


## References

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