Difference between revisions of "Actinometry"
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| + | |image_source= http://www.flickr.com/photos/29504544@N08/48651949687/in/pool-camerawiki/ | ||
| + | |image= https://live.staticflickr.com/65535/48651949687_d64c23af4c_m.jpg | ||
| + | |image_align= right | ||
| + | |image_text= Haka Expometer c.1910 | ||
| + | |image_by= Hans Kerensky | ||
| + | |image_rights= with permission | ||
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'''Actinometry''' is the measurement of the intensity of radiation - particularly light - and especially by measuring the speed of a photo-chemical reaction. | '''Actinometry''' is the measurement of the intensity of radiation - particularly light - and especially by measuring the speed of a photo-chemical reaction. | ||
Some early [[light meter]]s (often called ''actinometers'') worked by timing colour changes, caused by the chemical reaction to the light on strips of chemical-infused paper - a short piece of which could be uncovered from a dark box, allowing it into the light for use. The [[Watkins|Watkins Bee meter]] is an example of such an actinometer. | Some early [[light meter]]s (often called ''actinometers'') worked by timing colour changes, caused by the chemical reaction to the light on strips of chemical-infused paper - a short piece of which could be uncovered from a dark box, allowing it into the light for use. The [[Watkins|Watkins Bee meter]] is an example of such an actinometer. | ||
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| + | [[Category: Meters]] | ||
Latest revision as of 13:08, 1 December 2019
Glossary Terms
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| Haka Expometer c.1910 image by Hans Kerensky (Image rights) |
Actinometry is the measurement of the intensity of radiation - particularly light - and especially by measuring the speed of a photo-chemical reaction.
Some early light meters (often called actinometers) worked by timing colour changes, caused by the chemical reaction to the light on strips of chemical-infused paper - a short piece of which could be uncovered from a dark box, allowing it into the light for use. The Watkins Bee meter is an example of such an actinometer.
