actinometer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A Johnson's actinometer is very useful to time the exposure.

From Photogravure by Blaney, Henry R.

A very suitable instrument for timing the exposure of carbon tissue is Sawyer's actinometer.

From Photogravure by Blaney, Henry R.

Then note down everything you have done—kind of view, stop, speed of plate, exposure of each plate, and length of exposure of actinometer.

From Scientific American Supplement, No. 492, June 6, 1885 by Various

The actinometer of M. Violle is, in principle, a sphere of copper, blackened externally, and having inside a thermometric apparatus which registers some distance away.

From Sounding the Ocean of Air by Rotch, A. Lawrence

With daylight, however, the light is constantly fluctuating, and this renders the use of an actinometer a necessity for correct exposure.

From Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 by Martin, Marcus J.