Photometer

(definition) by Webster 1913 Wed Dec 22 1999 at 1:58:46

Pho*tom"e*ter (?), n. [Photo- + -meter: cf. F. photometre.] Physics

An instrument for measuring the intensity of light, or, more especially, for comparing the relative intensities of different lights, or their relative illuminating power.

 

© Webster 1913.

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