the potential in volts that must be applied to an atom or molecule to cause it to emit radiation at one of its characteristic frequencies.
noun, Physics. 1. the pressure exerted on a surface by electromagnetic radiation or by sound waves. radiation pressure Force per unit area exerted by waves or particles of radiation, especially photons. Though photons have no mass, they do have momentum, and can transfer that momentum to other particles upon impact. The amount of pressure exerted […]
- Radiation pyrometer
noun 1. See pyrometer
- Radiation resistance
noun 1. the resistive component of the impedance of a radio transmitting aerial that arises from the radiation of power
noun, Pathology. 1. sickness caused by irradiation with x-rays or other nuclear radiation as a result of therapeutic treatment, accidental exposure, or a nuclear bomb explosion and characterized by nausea, vomiting, headache, cramps, diarrhea, loss of hair and teeth, destruction of white blood cells, and prolonged hemorrhage. noun 1. (pathol) illness caused by overexposure of […]