# decadic absorbance

> common logarithm of the ratio of incident to transmitted radiant power through a material; the optical depth divided by ln(10)

**Wikidata**: [Q907315](https://www.wikidata.org/wiki/Q907315)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Absorbance)  
**Source**: https://4ort.xyz/entity/decadic-absorbance


## References

1. Freebase Data Dumps. 2013
2. ISO 80000-7:2019 Quantities and units — Part 7: Light and radiation
3. International Electrotechnical Vocabulary
4. Quora
5. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)