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Line spectrum |
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line spectrum: see spectrum spectrum, 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 ..... Click the link for more information. . 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 |
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| The hardened line spectrum at a distance of 1 m in air from the encapsulated source is given also in Table 6, and shows that the low-energy L-shell x rays with energies up to [approximately equal to] 14 keV are essentially absorbed completely. The line spectrum indicated that something more than simple heating was taking place. This standard includes signal power limits and technology deployment guidelines for digital subscriber line spectrum management classes. |
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