Difference between revisions of "Anti-matter"
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==Definitions== | ==Definitions== | ||
*1: matter composed of ''antiparticles'' | *1: matter composed of ''antiparticles'' | ||
:: a subatomic [[particle]] identical to another subatomic particle in [[mass]] but [[opposite]] to it in [[electric]] and [[magnetic]] [[properties]] (as sign of charge) that when brought [[together]] with its [[counterpart]] produces mutual [[annihilation]]; especially : a subatomic particle not found in ordinary [[matter]] | :: a subatomic [[particle]] identical to another subatomic particle in [[mass]] but [[opposite]] to it in [[electric]] and [[magnetic]] [[properties]] (as sign of charge) that when brought [[together]] with its [[counterpart]] produces mutual [[annihilation]]; especially : a subatomic particle not found in ordinary [[matter]] | ||
==Description== | ==Description== | ||
| − | In [[particle]] [[physics]], '''antimatter''' is the extension of the [[concept]] of the [ | + | In [[particle]] [[physics]], '''antimatter''' is the extension of the [[concept]] of the [https://en.wikipedia.org/wiki/Antiparticle antiparticle] to [[matter]], where antimatter is composed of antiparticles in the same way that [[normal]] matter is composed of particles. For example, a [https://en.wikipedia.org/wiki/Positron positron] (the antiparticle of the [[electron]] or e+ |
| − | ) and an [ | + | ) and an [https://en.wikipedia.org/wiki/Antiproton antiproton] (p) can form an [https://en.wikipedia.org/wiki/Antihydrogen antihydrogen] [[atom]] in the same way that an [[electron]] and a proton form a normal matter hydrogen atom. Furthermore, mixing [[matter]] and ''antimatter'' can lead to the [[annihilation]] of both in the same way that mixing antiparticles and [[particles]] does, thus giving rise to high-[[energy]] [https://en.wikipedia.org/wiki/Photon photons] (gamma rays) or other particle–antiparticle pairs. The result of antimatter meeting matter is an explosion.[1] |
| − | There is considerable [[speculation]] as to why the observable [[universe]] is apparently almost entirely [[matter]], whether there exist other places that are almost entirely antimatter instead, and what might be possible if antimatter could be harnessed. At this [[time]], the [[apparent]] [[asymmetry]] of [[matter]] and antimatter in the visible [[universe]] is one of the greatest unsolved [[problems]] in [[physics]]. The [[process]] by which this [[asymmetry]] between particles and antiparticles developed is called [ | + | There is considerable [[speculation]] as to why the observable [[universe]] is apparently almost entirely [[matter]], whether there exist other places that are almost entirely antimatter instead, and what might be possible if antimatter could be harnessed. At this [[time]], the [[apparent]] [[asymmetry]] of [[matter]] and antimatter in the visible [[universe]] is one of the greatest unsolved [[problems]] in [[physics]]. The [[process]] by which this [[asymmetry]] between particles and antiparticles developed is called [https://en.wikipedia.org/wiki/Baryogenesis baryogenesis].[https://en.wikipedia.org/wiki/Antimatter] |
[[Category: Physics]] | [[Category: Physics]] | ||
Latest revision as of 23:45, 12 December 2020
Definitions
- 1: matter composed of antiparticles
- a subatomic particle identical to another subatomic particle in mass but opposite to it in electric and magnetic properties (as sign of charge) that when brought together with its counterpart produces mutual annihilation; especially : a subatomic particle not found in ordinary matter
Description
In particle physics, antimatter is the extension of the concept of the antiparticle to matter, where antimatter is composed of antiparticles in the same way that normal matter is composed of particles. For example, a positron (the antiparticle of the electron or e+ ) and an antiproton (p) can form an antihydrogen atom in the same way that an electron and a proton form a normal matter hydrogen atom. Furthermore, mixing matter and antimatter can lead to the annihilation of both in the same way that mixing antiparticles and particles does, thus giving rise to high-energy photons (gamma rays) or other particle–antiparticle pairs. The result of antimatter meeting matter is an explosion.[1]
There is considerable speculation as to why the observable universe is apparently almost entirely matter, whether there exist other places that are almost entirely antimatter instead, and what might be possible if antimatter could be harnessed. At this time, the apparent asymmetry of matter and antimatter in the visible universe is one of the greatest unsolved problems in physics. The process by which this asymmetry between particles and antiparticles developed is called baryogenesis.[1]
