For background radiation from space, see cosmic background radiation.
Background radiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate introduction of radiation sources.
Background radiation originates from a variety of sources, both natural and artificial. These include both cosmic radiation and environmental radioactivity from naturally occurring radioactive materials (such as radon and radium), as well as man-made medical X-rays, fallout from nuclear weapons testing and nuclear accidents.
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Backgroundradiation is a measure of the level of ionizing radiation present in the environment at a particular location which is not due to deliberate...
Cosmic backgroundradiation is electromagnetic radiation that fills all space. The origin of this radiation depends on the region of the spectrum that...
The cosmic microwave background (CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an...
1989 to 1993. Its goals were to investigate the cosmic microwave backgroundradiation (CMB or CMBR) of the universe and provide measurements that would...
The discovery of cosmic microwave backgroundradiation constitutes a major development in modern physical cosmology. In 1964, US physicist Arno Allan Penzias...
Ionizing radiation (US) (or ionising radiation [UK]), including nuclear radiation, consists of subatomic particles or electromagnetic waves that have sufficient...
extinction rate Background independence, a condition in theoretical physics Background noise Backgroundradiation, the natural radiation that is always...
particle radiation consists of particles of non-zero rest energy, such as alpha radiation (α), beta radiation (β), proton radiation and neutron radiation acoustic...
Galactic Radiation and Background (GRAB) was the first successful United States orbital surveillance program, comprising a series of five Naval Research...
Internet background noise (IBN, also known as Internet backgroundradiation, by analogy with natural backgroundradiation) consists of data packets on...
and sound reproduction. In astronomy, background noise or cosmic backgroundradiation is electromagnetic radiation from the sky with no discernible source...
including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the universe...
epoch is to directly measure its effect on the cosmic microwave background (CMB) radiation. The CMB is very weakly polarized (to a level of a few μK) in...
microwave backgroundradiation is another example of thermal radiation. Blackbody radiation is a concept used to analyze thermal radiation in idealized...
technologically enhanced naturally occurring radioactive material. BackgroundradiationBackgroundradiation equivalent time Flight-time equivalent dose List of humorous...
Hawking radiation is the theoretical thermal black-body radiation released outside a black hole's event horizon. This is counterintuitive because once...
Background Explorer with John C. Mather that led to the "discovery of the black body form and anisotropy of the cosmic microwave backgroundradiation"...
Microwave is a form of electromagnetic radiation with wavelengths shorter than other radio waves (as originally discovered) but longer than infrared waves...
disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three...
A gamma ray, also known as gamma radiation (symbol γ ), is a penetrating form of electromagnetic radiation arising from the radioactive decay of atomic...
Radiation hormesis is the hypothesis that low doses of ionizing radiation (within the region of and just above natural background levels) are beneficial...
Along with Robert Woodrow Wilson, he discovered the cosmic microwave backgroundradiation, for which he shared the Nobel Prize in Physics in 1978. Penzias...
gamma ray bursts, quasars, blazars, pulsars, and cosmic microwave backgroundradiation. More generally, astronomy studies everything that originates beyond...
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