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spectrometer
spectrometer An instrument which, with associated equipment, furnishes the ratio, or some function of a ratio, of the radiant power of two electromagnetic beams as a function of their spectral wavelength. It requires a source of radiation (in emission spectrometers the sample serves as its own source), a means of distinguishing between different radiation frequencies, and includes narrow band filters, a prism, a diffraction grating, a system of slits to isolate a narrow band of radiation, a samplecontaining system, and a photodetector, amplifier, and output device (meter, recorder, VDU, etc.) See GAMMA-RAY SPECTROMETRY; and MASS SPECTROMETRY.
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AILSA ALLABY and MICHAEL ALLABY. "spectrometer." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "spectrometer." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-spectrometer.html AILSA ALLABY and MICHAEL ALLABY. "spectrometer." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-spectrometer.html |
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spectrometer
spectrometer A spectrograph in which the output spectrum is scanned by a photoelectric photometer to produce a record of how the intensity of a spectrum varies with wavelength. A modern example is the radial velocity spectrometer, in which the positions of the spectral lines are measured to deduce the radial velocity of the star. Otherwise, spectrometers are now rarely used because CCD detectors can record large regions of a spectrum at once, and the device is then known as a spectrograph.
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"spectrometer." A Dictionary of Astronomy. 1997. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "spectrometer." A Dictionary of Astronomy. 1997. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O80-spectrometer.html "spectrometer." A Dictionary of Astronomy. 1997. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O80-spectrometer.html |
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spectrometer
spec·trom·e·ter / spekˈträmitər/ • n. an apparatus used for recording and measuring spectra, esp. as a method of analysis. DERIVATIVES: spec·tro·met·ric / ˌspektrəˈmetrik/ adj. spec·trom·e·try / spekˈträmətrē/ n. |
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Cite this article
"spectrometer." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>. "spectrometer." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O999-spectrometer.html "spectrometer." The Oxford Pocket Dictionary of Current English. 2009. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-spectrometer.html |
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