![]() spectrum - an ordered array of the components of an emission or wave. Line spectral pairs(LSP) or line spectral frequencies(LSF) are used to represent linear prediction coefficients(LPC) for transmission over a channel.1 LSPs have several properties (e.g. For highly ionized atoms, the lines are found in the extreme UV or x-ray region.Īs the relative intensity of the lines in an atomic spectrum varies with temperature, analysis of the lines in the spectrum of a star (say) can give an estimate of the temperature of the star’s surface (photosphere). 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. ![]() These 'fingerprints' can be compared to the previously collected ones of atoms and molecules, and are thus used to identify the atomic and molecular components of stars and planets, which would otherwise be impossible. Spectral lines are often used to identify atoms and molecules. The light electronic transitions in atoms produces may not be in the visual part of the electromagnetic spectrum, but for atoms that are neutral or have lost only one or two electrons (yes, ‘atomic spectra’ refers to the line spectrum of ions too!), most lines are in the UV, visual, or near infrared. A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Of course, for an extragalactic object – a quasar, perhaps – you need more than one line to make a certain identification … because the universe is expanding (and so you don’t know how much just one line may have been redshifted). As the atomic electron energy levels are unique to each element, the lines in a spectrum (emission or absorption) can be used to identify the elements present in the source (a star, say) or gas between the source and us (e.g. Spectra Geospatial offers powerful, highly versatile yet ultra-rugged and reliable Global Navigation Satellite System (GNSS) positioning solutions for a wide variety of applications.
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