# spectral quantity

> density of an electromagnetic quantity with respect to wavelength, frequency, wavenumber etc.

**Wikidata**: [Q12718557](https://www.wikidata.org/wiki/Q12718557)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Spectral_quantity)  
**Source**: https://4ort.xyz/entity/spectral-quantity


## References

1. International Electrotechnical Vocabulary