radiometer
nounEtymology From radio- + -meter.
1
A device that measures radiant energy.
- The geometry of the cone θ and the irradiance at the image of the carbon block were used to determine the absolute steradiancy of the energy in the cone θ as a radiometer calibration value.1959, United States. National Aeronautics and Space Administration, NASA Technical Note (issues 3641-3650, page 15)
- Derived terms
- Crookes radiometer, photoradiometer, spectroradiometer