# angstrom

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## angstrom

(ăng`strəm), abbr. Å, unit of length equal to 10−10 metermeter,
abbr. m, fundamental unit of length in the metric system. The meter was originally defined as 1/10,000,000 of the distance between the equator and either pole; however, the original survey was inaccurate and the meter was later defined simply as the distance between two
(0.0000000001 meter); it is used to measure the wavelengths of visible light and of other forms of electromagnetic radiationelectromagnetic radiation,
energy radiated in the form of a wave as a result of the motion of electric charges. A moving charge gives rise to a magnetic field, and if the motion is changing (accelerated), then the magnetic field varies and in turn produces an electric field.
, 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.

## 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

## angstrom

[′aŋ·strəm]
(mechanics)
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.

## angstrom

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.

## angstrom

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

## angstrom

A 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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References in periodicals archive ?
SACLA (SPring-8 Angstrom Compact free electron LAser) opens a window into the structure of atoms and molecules at a level of detail never seen before.
IN 1965 The Angstroms played a rooftop concert at the Locarno.
Imation's proprietary Tera Angstrom Technology will be the cornerstone for the development of future magnetic media products that reach terabyte capacities and beyond, which will help keep the boat afloat and carry the enterprise a long way into the future.
In his CCD Astronomy article, Gavin showed a methane absorption feature in the planet's spectrum at 7250 angstroms, but the resolution was low due to Jupiter's large size and the small dispersion of the objective prism at red wavelengths.
However, the success of these efforts has generally been limited to "soft" X-rays, having wavelengths of 100 angstroms or more.
Chemists may even attempt to grow crystals within these new nanometer-size molds -- given that the tubes' inner dimensions, which would serve as the template, can be controlled to within a feq angstroms. "This has been very difficult to do so far because of a lack of uniformly shaped tube devices," says Ghadiri.
Measuring 140 angstroms by 300 angstroms, this flattened ellipse will, they hope, create an arena in which electrons can careen chaotically around, again enabling them to test behavior against theory.
The artificial atom itself corresponds to a location - a few hundred angstroms wide - in the gallium arsenide crystal that can be completely emptied of electrons, then gradually refilled.
To verify this theory DXS will examine several regions of the sky, measuring the direction of origin of X-rays that range in wavelength from 42 angstroms to 84 angstroms.
But the resolution of the friction force microscope is hundreds of times better; it sees features on the scale of angstroms as opposed to microns, says Frommer.
Tribologists had suspected that, compared to a liquid in bulk form, thin films of a lubricant - on the order of about five molecules, or 20 angstroms, thick - might become perhaps twice as viscous.
Together, the four telescopes will detect extreme-ultraviolet radiation ranging in wavelength from about 70 angstroms to 760 angstroms.

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