line spectrum
line spectrum
| Noun | 1. | line spectrum - a spectrum in which energy is concentrated at particular wavelengths; produced by excited atoms and ions as they fall back to a lower energy level |
| 单词 | line spectrum | |||
| 释义 | line spectrumline spectrum
line spectrumline 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). ..... Click the link for more information. . Line spectrumA 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 line spectrumA 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.line spectrum[′līn ‚spek·trəm]line spectrumline spec·trum(līn spek'trŭm)line spectrum
Words related to line spectrum
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