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photoelectric photometer

An instrument for measuring the brightness of a star by means of the electric current produced when its light falls on a light-sensitive surface (the photoelectric effect). The light ...

photometer

photometer n.   Quick reference

A Dictionary of Psychology (4 ed.)

Reference type:
Subject Reference
Current Version:
2015

... n . An instrument for measuring luminous intensity , older types usually involving visual comparisons of the illumination from a specified light source with that from a standard comparison source, and more modern types using photoelectric cells that generate electrical signals in response to light. photometry n . The measurement of luminous intensity , luminous flux , and related phenomena, or the branch of physics concerned with these phenomena. [From Greek phos , photos light + metron a...

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