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background radiation
ionizing radiation that is naturally present in the environment.
ionizing radiation
High-energy radiation that is capable of causing ionization in substances through which it passes; also includes high-energy particles.
electromagnetic radiation
Radiation (quantized as photons) consisting of oscillating electric and magnetic fields oriented perpendicularly to each other, moving through space.
Cerenkov radiation
synchrotron radiation
(physics) The electromagnetic radiation emitted by the acceleration of relativistic charged particles in a synchrotron or under natural conditions approximating those of a synchrotron.
infrared radiation
(physics) Electromagnetic radiation having a wavelength approximately between 1 micrometre and 1 millimetre; perceived as heat.
thermal radiation
(physics) The electromagnetic radiation emitted from a body as a consequence of its temperature; increasing the temperature of the body increases the amount of radiation produced, and shifts it to shorter wavelengths (higher frequencies) in a manner explained only by quantum mechanics.
radiation sickness
(medicine, pathology) Any illness produced by ionizing radiation with symptoms ranging from nausea to death.
radiation poisoning
Synonym of radiation sickness
gravitational radiation
(physics) a hypothetical wave, produced by an accelerating mass, that would be propagated at the speed of light