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Ångström, Anders Jöns
Ångström, Anders Jöns (änˈdərs yöns ōngˈström), 1814–74, Swedish physicist. He was educated at the Univ. of Uppsala and in 1839 became a member of its faculty. He is particularly noted for his study of light, especially spectrum analysis. He mapped the solar spectrum, discovered hydrogen in the solar atmosphere, and was the first to examine the spectrum of the aurora borealis. A unit of length used to measure light waves is named for him.
angstrom (ăngˈstrəm), abbr. Å, unit of length equal to 10−10 meter (0.0000000001 meter); it is used to measure the wavelengths of visible light and of other forms of electromagnetic radiation, such as ultraviolet radiation and X rays. Scientists now prefer to use the nanometer (nm); 1 nm=10 Å. The angstrom is named in honor of Swedish physicist Anders J. Ångström.
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angstrom(ang -strŏm) Symbol: Å;. A unit of length equal to 10–10 meters. It was formerly used to specify interatomic distances.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
A unit of length, 10-10 meter, used primarily to express wavelengths of optical spectra. Abbreviated A; Å. Also known as tenthmeter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
A unit of length; used to express electromagnetic wavelengths; 1 Å = 10-10 meter = 1/10 nanometer. Abbr. Å.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
a unit of length equal to 10--10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometre.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
angstromA unit of measurement equal to .1 nanometer, which is approximately 1/250 millionth of an inch. Angstroms are used to measure the wavelengths of light and the elements in a chip. One nanometer is equal to 10 angstroms, and one micron is equal to 10,000 angstroms. The size of an atom is three to 10 angstroms.
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