You searched for: “actinography”
actinography (s) (noun), actinographies (pl)
The calculation of suitable exposure times in photography through the use of a recording actinometer or an instrument that is used to measure the heating power of radiation.
Actinometers are used in meteorology to measure solar radiation as pyranometers, pyrheliometers and net radiometers.
An actinometer is a chemical system or physical device which determines the number of photons in a beam per unit time.
This entry is located in the following unit: grapho-, graph-, -graph, -graphy, -grapher, -graphia (page 1)