line spectrum

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Related to line spectrum: continuous spectrum

line spectrum:

see spectrumspectrum,
arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Beams of charged particles can be separated into a spectrum according to mass in a mass spectrometer (see mass spectrograph).
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Line spectrum

A discontinuous spectrum characteristic of excited atoms, ions, and certain molecules in the gaseous phase at low pressures. If an electric arc or spark between metallic electrodes, or an electric discharge through a low-pressure gas, is viewed through a spectroscope, images of the spectroscope slit are seen in the characteristic colors emitted by the atoms or ions present. See Atomic structure and spectra, Spectroscopy

McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.

line spectrum

A spectrum consisting of discrete lines (spectral lines) resulting from radiation emitted or absorbed at definite wavelengths. Line spectra are produced by atoms or ionized atoms when transitions occur between their energy levels as a result of emission or absorption of photons. The Fraunhofer lines of the Sun are an example of an absorption line spectrum.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

line spectrum

[′līn ‚spek·trəm]
A spectrum of radiation in which the quantity being studied, such as frequency or energy, takes on discrete values.
Conventionally, the spectra of atoms, ions, and certain molecules in the gaseous phase at low pressures; distinguished from band spectra of molecules, which consist of a pattern of closely spaced spectral lines which could not be resolved by early spectroscopes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
In retrospect, it makes perfect sense that it shows a line spectrum.
Caption: EMISSION IN ACTION In this sketch of NGC 6543's emission line spectrum as seen through the author's 28-inch f/4 reflecting telescope, the darkest vertical line corresponds to the O III lines at 495.9 nm and 500.7 nm.
The Fourier transform of the complex Fourier series is a one-sided pure line spectrum at multiples of the gear rotation rate.
He discussed these plates in a 1942 Astrophysical Journal paper in which he concluded, "The line spectrum of the Crab nebula originates in the outer envelope of filaments, the continuum in the inner amorphous mass.