(rā′dē äm′ə tər)
- a device containing a set of vanes that are blackened on one side and suspended on an axis in a vacuum: the vanes rotate on exposure to sunlight
- an instrument for measuring radiant energy in any part of the electromagnetic spectrum
radio- + -meter
See radiometer in American Heritage Dictionary 4
- A device that measures the intensity of radiant energy, consisting of a partially evacuated glass bulb containing lightweight vertical vanes, each blackened on one side, suspended radially about a central vertical axis to permit their revolution about the axis as a result of incident radiation.
- An instrument that detects electromagnetic radiation.
- raˌdi·o·metˈric (-ō-mĕtˈrĭk) adjective
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