# Poynting's theorem

> theorem in physics, showing the conservation of energy for the electromagnetic field, expressed in the form of a partial differential equation developed by British physicist John Henry Poynting

**Wikidata**: [Q1637085](https://www.wikidata.org/wiki/Q1637085)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Poynting's_theorem)  
**Source**: https://4ort.xyz/entity/poynting-s-theorem


## References

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