- hydrogen lines
- líneas de hidrógeno
English-Spanish dictionary of astronomy terms. 2014.
hydrogen lines
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Hydrogen line — For hydrogen lines in general, see Hydrogen spectral series. The hydrogen line, 21 centimeter line or HI line refers to the electromagnetic radiation spectral line that is created by a change in the energy state of neutral hydrogen atoms. This… … Wikipedia
Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium … Wikipedia
hydrogen — /huy dreuh jeuhn/, n. a colorless, odorless, flammable gas that combines chemically with oxygen to form water: the lightest of the known elements. Symbol: H; at. wt.: 1.00797; at. no.: 1; density: 0.0899 g/l at 0°C and 760 mm pressure. [1785 95;… … Universalium
Hydrogen economy — The hydrogen economy is a proposed system of delivering energy using hydrogen. The term hydrogen economy was coined by John Bockris during a talk he gave in 1970 at General Motors (GM) Technical Center.[1] Hydrogen advocates promote hydrogen as… … Wikipedia
Hydrogen chloride — HCl redirects here. For the acid, see Hydrochloric acid. Hydrogen chloride … Wikipedia
Hydrogen atom — Stable Isotope isotope name = Hydrogen 1 isotope filename = hydrogen 1.png alternate names = protium mass number = 1 symbol = H num neutrons = 0 num protons = 1 abundance = 99.985% mass = 1.007825 spin = ½+ excess energy = 7288.969 error1 = 0.001 … Wikipedia
Hydrogen spectral series — In physics, the spectral lines of hydrogen correspond to particular jumps of the electron between energy levels. The simplest model of the hydrogen atom is given by the Bohr model. When an electron jumps from a higher energy to a lower, a photon… … Wikipedia
hydrogen spectral series — noun several series of spectral lines of hydrogen that correspond to quantum transitions between the various allowed energy levels of the hydrogen atom … Wiktionary
hydrogen spectrum — noun all the lines in the emission or absorption spectrum of hydrogen; each one corresponding to an allowed transition between quantum energy levels See Also: hydrogen spectral series … Wiktionary
Korean Air Lines Flight 007 — Flight 007 redirects here. For other uses, see Flight 7 (disambiguation). Korean Air Lines Flight 007 Artist s rendition of HL7442, the KAL 747 lost during Flight 007 Occurrence summary … Wikipedia
Fraunhofer lines — In physics and optics, the Fraunhofer lines are a set of spectral lines named for the German physicist Joseph von Fraunhofer (1787–1826). The lines were originally observed as dark features (absorption lines) in the optical spectrum of the… … Wikipedia
