# Planck's law

> physical law that describes the amount of spectral radiance at a certain wavelength radiated by a black body cavity in thermal equilibrium

**Wikidata**: [Q212986](https://www.wikidata.org/wiki/Q212986)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Planck's_law)  
**Source**: https://4ort.xyz/entity/planck-s-law


## References

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