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spectroscope

spectroscope, optical instrument for producing spectral lines and measuring their wavelengths and intensities, used in spectral analysis (see spectrum). When a material is heated to incandescence it emits light that is characteristic of the atomic makeup of the material. In the original spectroscope design in the early 19th cent., light entered a slit and a collimating lens transformed the light into a thin beam of parallel rays. A prism then separated the beam into its spectrum. The observer then viewed the spectrum through a tube with a scale that was transposed up the spectrum image, enabling its direct measurement. With the development of photographic film, the more accurate spectrograph was developed. It was based on the same principle as the spectroscope, but it had a camera in place of the telescope. In recent years the electronic circuits built around the photomultiplier tube have replaced the camera, allowing real-time spectrographic analysis of far greater accuracy. Such spectrum analysis, or spectroscopy, has become an important scientific tool for analyzing the composition of unknown material. It has found applications in fields as disparate as astronomy and forensic chemistry.

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spectroscope

spectroscope An instrument used in spectroscopy, whose main features are a slit and collimator, prism, telescope, and counter. A parallel beam of radiation is passed through the prism, so dispersing different wavelengths through different angles of deviation, which can be measured.

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"spectroscope." A Dictionary of Earth Sciences. . Encyclopedia.com. 25 Jun. 2017 <http://www.encyclopedia.com>.

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"spectroscope." A Dictionary of Earth Sciences. . Retrieved June 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/spectroscope

spectroscope

spectroscope (spek-trŏ-skohp) n. an instrument that is used to split up light or other radiation into components of different wavelengths. The simplest spectroscope uses a prism, which splits white light into the rainbow colours of the visible spectrum.

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"spectroscope." A Dictionary of Nursing. . Encyclopedia.com. 25 Jun. 2017 <http://www.encyclopedia.com>.

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"spectroscope." A Dictionary of Nursing. . Retrieved June 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/caregiving/dictionaries-thesauruses-pictures-and-press-releases/spectroscope

spectroscope

spec·tro·scope / ˈspektrəˌskōp/ • n. an apparatus for producing and recording spectra for examination.

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"spectroscope." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 25 Jun. 2017 <http://www.encyclopedia.com>.

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"spectroscope." The Oxford Pocket Dictionary of Current English. . Retrieved June 25, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/spectroscope