spectroscope


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spectroscope,

optical instrument for producing spectral lines and measuring their wavelengths and intensities, used in spectral analysis (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).
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). 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.

spectroscope

[′spek·trə‚skōp]
(spectroscopy)
An optical instrument consisting of a slit, collimator lens, prism or grating, and a telescope or objective lens which produces a spectrum for visual observation.

spectroscope

any of a number of instruments for dispersing electromagnetic radiation and thus forming or recording a spectrum
References in periodicals archive ?
Doctors using mobile Raman spectroscopes during an operation could unambiguously say whether the patient has cancer or not simply by comparing the cell sample with the data base, according to Schenke-Layland.
Smallest impurities: Unique detection of smallest impurities due to 4 IMAGING SPECTROSCOPES.
A spectroscope splits visible light into bands of color, called spectral lines, that are distinct for different kids of light and chemical elements.
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A useful juvenile hurdler this winter, Fortune Island even took his chance in the JCB Triumph Hurdle at Cheltenham, finishing 12th to Spectroscope following a win at Exeter.
In Flagstaff, the Lowell Observatory visitor center features interactive exhibits and the spectroscope used in the discoveries of Pluto and the expanding universe.
Between 1814 and 1824, Joseph Fraunhofer built the first spectroscope, or "spectrum viewer," by placing a prism before the eyepiece of a telescope to study the dim light of "heavenly" objects.
The spectroscope measures the resonant absorption of microwave radiation by paramagnetic ions or molecules, with at least one unpaired electron spin, in the presence of a static magnetic field.
Every element gives off a distinctive visual signal, and the optical device called the spectroscope (because it breaks apart the light spectrum) allows them to be identified.
A low-budget spectroscope of thirtysomething angst, "Marta and Surroundings" reps an accomplished, if unexciting, directorial debut with small but solid virtues.
I didn't know what a spectroscope was, but the government had originally purchased it for nearly $11,000, and that was good enough for me.

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