ionized region

См. также в других словарях:

• Solar transition region — The solar transition region is a region of the Sun s atmosphere, between the chromosphere and corona. It is visible from space using telescopes that can sense ultraviolet. It is important because it is the site of several unrelated but important… …   Wikipedia

• Depletion region — In semiconductor physics, the depletion region, also called depletion layer, depletion zone, junction region or the space charge region, is an insulating region within a conductive, doped semiconductor material where the mobile charge carriers… …   Wikipedia

• Low-ionization nuclear emission-line region — cite journal author= L. C. Ho, A. V. Filippenko, W. L. W. Sargent title=A Search for Dwarf Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies journal=Astrophysical Journal Supplement year=1997 volume=112… …   Wikipedia

• H II region — ▪ astronomy also spelled  H ii region,   in astronomy, interstellar matter consisting of ionized hydrogen atoms. Such regions occur as hot, ionized gaseous clouds, sometimes called emission nebulae. The energy that is responsible for ionizing and …   Universalium

• H II region — An H II region (also known as emission nebula) is a cloud of glowing gas and plasma, sometimes several hundred light years across, in which star formation is taking place. Young, hot, blue stars which have formed from the gas emit copious amounts …   Wikipedia

• F region — The F region of the ionosphere is home to the F layer of ionization, also called the Appleton layer , after the English physicist Edward Appleton. As with other ionospheric sectors, layer implies a concentration of plasma, while region is the… …   Wikipedia

• H I region — An H I region is an interstellar cloud composed of neutral atomic hydrogen (H I). These regions are non luminous, save for emission of the 21 cm (1,420 MHz) region spectral line. This line has a very low transition probability, so requires large… …   Wikipedia

• F region — the ionospheric region in which the F layer forms. [1925 30] * * * ▪ atmospheric science       highest region of the ionosphere, at altitudes greater than 160 km (100 miles); it has the greatest concentration of free electrons and is the most… …   Universalium

• nebula — nebular, adj. /neb yeuh leuh/, n., pl. nebulae / lee , luy /, nebulas. 1. Astron. a. Also called diffuse nebula. a cloud of interstellar gas and dust. Cf. dark nebula, emission nebula, reflection nebula …   Universalium

• Corona discharge — The corona discharge around a high voltage coil …   Wikipedia

• electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium