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  • comparison spectroscope A device used for the comparison of spectra used, in turn, for the comparison of elements, such as the absorption lines in the spectra of stars and the spectra of elements in the stars being observed.
  • direct-vision pocket spectroscope A small handheld instrument consisting of a slit and collimator that feeds light into a small direct-vision dispersing prism. The eye is placed behind the prism to observe the spectrum of a colored flame or other spectral source. A wavelength scale...
  • grating spectroscope A spectroscope having a diffraction grating for the resolution of light of various wavelengths.  
  • spectroscopy The branch of science dealing with the theory and interpretation of spectra.
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