Radiation (disambiguation)
Encyclopedia
Radiation
is a process in which a body emits energy that propagates through a medium, or through empty space, to be absorbed by other bodies. Radiation may also refer to:
Physics
Medicine
Evolutionary biology
Regulatory law
Music and arts
Radiation
In physics, radiation is a process in which energetic particles or energetic waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing...
is a process in which a body emits energy that propagates through a medium, or through empty space, to be absorbed by other bodies. Radiation may also refer to:
Physics
- Electromagnetic radiationElectromagnetic radiationElectromagnetic radiation is a form of energy that exhibits wave-like behavior as it travels through space...
, radiation that takes the form of a self-propagating wave of electric and magnetic fields, including such phenomena as radio waves and visible light - Ionizing radiationIonizing radiationIonizing radiation is radiation composed of particles that individually have sufficient energy to remove an electron from an atom or molecule. This ionization produces free radicals, which are atoms or molecules containing unpaired electrons...
, radiation that is of high enough energy to cause atoms to lose or gain electrons, rendering molecules, such as proteins, incapable of functioning - Nuclear radiation, radiation, especially ionizing radiation, that emanates from nuclear processes such as radioactive decay
- Thermal radiationThermal radiationThermal radiation is electromagnetic radiation generated by the thermal motion of charged particles in matter. All matter with a temperature greater than absolute zero emits thermal radiation....
, electromagnetic radiation that emanates from every object above absolute zero, in proportion to the fourth power of the temperature of the object - Synchrotron radiationSynchrotron radiationThe electromagnetic radiation emitted when charged particles are accelerated radially is called synchrotron radiation. It is produced in synchrotrons using bending magnets, undulators and/or wigglers...
, also called a synchrotron light source, electromagnetic radiation generated by the acceleration of fast moving charged particles through magnetic fields
Medicine
- Radiation therapyRadiation therapyRadiation therapy , radiation oncology, or radiotherapy , sometimes abbreviated to XRT or DXT, is the medical use of ionizing radiation, generally as part of cancer treatment to control malignant cells.Radiation therapy is commonly applied to the cancerous tumor because of its ability to control...
, also called radiotherapy, a medical treatment that involves exposing part or all of the body to a controlled amount of ionizing radiation - Radiation poisoningRadiation poisoningAcute radiation syndrome also known as radiation poisoning, radiation sickness or radiation toxicity, is a constellation of health effects which occur within several months of exposure to high amounts of ionizing radiation...
, a form of damage to organ tissue due to excessive exposure to ionizing radiation - Radiation, characteristics of an affliction, such as pain, to spread to other parts of the body than the origin
Evolutionary biology
- Evolutionary radiationEvolutionary radiationAn evolutionary radiation is an increase in taxonomic diversity or morphological disparity, due to adaptive change or the opening of ecospace. Radiations may affect one clade or many, and be rapid or gradual; where they are rapid, and driven by a single lineage's adaptation to their environment,...
, a diversification into several lineages from a common ancestor - Adaptive radiationAdaptive radiationIn evolutionary biology, adaptive radiation is the evolution of ecological and phenotypic diversity within a rapidly multiplying lineage. Starting with a recent single ancestor, this process results in the speciation and phenotypic adaptation of an array of species exhibiting different...
, an evolutionary radiation to fill many ecological niches
Regulatory law
- Intentional radiatorIntentional radiatorAn intentional radiator is any device that is designed to produce radio waves on purpose.Radio transmitters of all kinds, including the garage door opener, cordless telephone, cellular phone, wireless video sender, wireless microphone, and many others fall into this category.-See also:* incidental...
, radio waves that are produced by an electronic device as a necessary part of its function, such as those produced by a radio transmitter - Unintentional radiatorUnintentional radiatorAn unintentional radiator or Incidental radiator is any device which creates radio frequency energy within itself, which is then unintentionally radiated from the device...
, undesirable radio waves that are produced by an electronic device, such as a computer or video game console, as a consequence of its design
Music and arts
- Radiation (album)Radiation (album)Radiation is a 1998 album by Marillion. The only single from this album is "These Chains".As Marillion's tenth studio album, the number 10 can be seen in the "io" in both "Marillion" and "Radiation" on the cover.-Track listing:...
, released in 1998, the tenth studio album by the British progressive rock band Marillion