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Definitions for: Radiometer [n] meter to detect and measure radiant energy (electromagnetic or acoustic)
Webster (1913) Definition: Ra`di*om"e*ter, n. [L. radius radius + -meter: cf.
F. radiom[`e]tre.]
1. (Naut.) A forestaff.
2. (Physics) An instrument designed for measuring the
mechanical effect of radiant energy.
Note: It consists of a number of light discs, blackened on
one side, placed at the ends of extended arms,
supported on an a pivot in an exhausted glass vessel.
When exposed to rays of light or heat, the arms rotate.
See Also: Crookes radiometer, meter, radiomicrometer, Rayleigh disk
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