# old quantum theory

> set of heuristic corrections to classical physics that served as a predecessor to modern quantum mechanics (1900–1925)

**Wikidata**: [Q2566926](https://www.wikidata.org/wiki/Q2566926)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Old_quantum_theory)  
**Source**: https://4ort.xyz/entity/old-quantum-theory


## References

1. Freebase Data Dumps. 2013
2. Quora