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actinometer
[ ak-tuh-nom-i-ter ]
noun
- a device for measuring intensity of radiation, especially that of the sun.
actinometer
/ ˌæktɪnəʊˈmɛtrɪk; ˌæktɪˈnɒmɪtə /
noun
- an instrument for measuring the intensity of radiation, esp of the sun's rays
actinometer
/ ăk′tə-nŏm′ĭ-tər /
- Any of several instruments used to measure radiation, such as a pyrheliometer.
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Derived Forms
- ˌactiˈnometry, noun
- actinometric, adjective
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Other Words From
- ac·tin·o·met·ric [ak-tin-oh-, me, -trik, ak-t, uh, -noh-], ac·tino·metri·cal adjective
- acti·nome·try noun
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Word History and Origins
Origin of actinometer1
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Example Sentences
For judging long exposures, the use of an actinometer (issued in many inexpensive forms) is helpful.
We then shift the paper in the actinometer so as to get a fresh portion under the tissue strips, or we substitute a new piece.
Now refer to the actinometer and see what has taken place on the silver paper which we put into it.
The mystery was not a new type of infernal machine as they imagined but merely a home-made actinometer!
A very suitable instrument for timing the exposure of carbon tissue is Sawyer's actinometer.
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