# reciprocity

> in photography, the inverse relationship between the intensity and duration of light that determines the reaction of light-sensitive material

**Wikidata**: [Q904761](https://www.wikidata.org/wiki/Q904761)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Reciprocity_(photography))  
**Source**: https://4ort.xyz/entity/reciprocity-q904761


## References

1. Freebase Data Dumps. 2013