Radiation in physics is a process of emission of energy in the form of waves or particles. Various types of radiation may be distinguished, depending on the properties of the emitted energy/matter, the type of the emission source, properties and purposes of the emission, etc.

Radiation by type of emission

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• Electromagnetic radiation, a stream of photons.
  • Gamma radiation, which is high-energy electromagnetic waves.
• Gravitational radiation, a predicted consequence of general relativity.
• Particle radiation, radiation by means of particles that have a rest mass.
  • Alpha radiation, composed of the nuclei of helium-4 atoms.
  • Beta radiation, consisting of energetic electrons or positrons.
  • Neutron radiation

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@SpaceFellowship Although it is mentioned, Curiosity's measurement of cosmic radiation is a critical segment of its explorations. #ISF
XiNeutrino (Waddell Robey) Sat, 31 Oct 2009 13:22:34 -0000
@SpaceFellowship Although it is mentioned, Curiosity's measurement of cosmic radiation is a critical segment of its explorations. #ISF
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GlennSeymour (Glenn Seymour) Fri, 30 Oct 2009 18:13:29 -0000
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