Difference between revisions of "Cosmic background radiation"
(Created page with 'File:lighterstill.jpgright|frame *[http://en.wikipedia.org/wiki/1976 1976] ==Description== '''Cosmic background radiation''' is electromagnetic [...') |
m (Text replacement - "http://" to "https://") |
||
| Line 1: | Line 1: | ||
[[File:lighterstill.jpg]][[File:Ng4yrhists.jpg|right|frame]] | [[File:lighterstill.jpg]][[File:Ng4yrhists.jpg|right|frame]] | ||
| − | *[ | + | *[https://en.wikipedia.org/wiki/1976 1976] |
==Description== | ==Description== | ||
| − | '''Cosmic background radiation''' is [[electromagnetic]] [[radiation]] from the [[sky]] with no discernible source. The origin of this radiation depends on the region of the [[spectrum]] that is [[observed]]. One component is the cosmic microwave background radiation. This component is [ | + | '''Cosmic background radiation''' is [[electromagnetic]] [[radiation]] from the [[sky]] with no discernible source. The origin of this radiation depends on the region of the [[spectrum]] that is [[observed]]. One component is the cosmic microwave background radiation. This component is [https://en.wikipedia.org/wiki/Redshifted redshifted] [https://en.wikipedia.org/wiki/Photon photons] that have freely streamed from an [[epoch]] when [[the Universe]] became transparent for the first time to [[radiation]]. Its [[discovery]] and detailed observations of its properties are considered one of the major confirmations of the [[Big Bang]]. The discovery (by [[chance]] in 1965) of the cosmic background radiation proves that the early universe was dominated by a radiation field, a field of extremely high [[temperature]] and [[pressure]]. |
| − | The [ | + | The [https://en.wikipedia.org/wiki/Sunyaev%E2%80%93Zel%27dovich_effect Sunyaev–Zel'dovich effect] shows the [[phenomena]] of radiant cosmic background radiation [[interacting]] with "electron" clouds [[distorting]] the spectrum of the radiation. |
| − | There is also background radiation in the [ | + | There is also background radiation in the [https://en.wikipedia.org/wiki/Infrared infrared], [[x-ray]]s, etc., with different causes, and they can sometimes be resolved into an individual source. See cosmic infrared background and X-ray background. See also [https://en.wikipedia.org/wiki/Cosmic_neutrino_background cosmic neutrino background] and [https://en.wikipedia.org/wiki/Extragalactic_background_light extragalactic background light].[https://en.wikipedia.org/wiki/Cosmic_background_radiation] |
[[Category: Cosmology]] | [[Category: Cosmology]] | ||
Latest revision as of 23:46, 12 December 2020
Description
Cosmic background radiation is electromagnetic radiation from the sky with no discernible source. The origin of this radiation depends on the region of the spectrum that is observed. One component is the cosmic microwave background radiation. This component is redshifted photons that have freely streamed from an epoch when the Universe became transparent for the first time to radiation. Its discovery and detailed observations of its properties are considered one of the major confirmations of the Big Bang. The discovery (by chance in 1965) of the cosmic background radiation proves that the early universe was dominated by a radiation field, a field of extremely high temperature and pressure.
The Sunyaev–Zel'dovich effect shows the phenomena of radiant cosmic background radiation interacting with "electron" clouds distorting the spectrum of the radiation.
There is also background radiation in the infrared, x-rays, etc., with different causes, and they can sometimes be resolved into an individual source. See cosmic infrared background and X-ray background. See also cosmic neutrino background and extragalactic background light.[1]
