# Rydberg–Ritz combination principle

> principle of spectral lines

**Wikidata**: [Q2605552](https://www.wikidata.org/wiki/Q2605552)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Rydberg–Ritz_combination_principle)  
**Source**: https://4ort.xyz/entity/rydberg-ritz-combination-principle


## References

1. Nuovo soggettario
2. Freebase Data Dumps. 2013