Photometer

[fәu'tɒmitә]

Definition

(noun.) measuring instrument for measuring the luminous intensity of a source by comparing it (visually or photoelectrically) with a standard source.

Checked by Alma--From WordNet

Definition

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

Editor: Val

Definition

n. an instrument for measuring the intensity of light esp. for comparing the amount of light coming from different sources.—adjs. Photomet′ric -al.—n. Photom′etry the measurement of the intensity of light.

Inputed by Ethel