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spectrometer vs. spectrophotometer

[ spek-trom-i-ter ]
  1. an optical device for measuring wavelengths, deviation of refracted rays, and angles between faces of a prism, especially an instrument (prism spectrometer ) consisting of a slit through which light passes, a collimator, a prism that deviates the light, and a telescope through which the deviated light is viewed and examined.
[ spek-troh-foh-tom-i-ter ]
  1. an instrument for making photometric comparisons between parts of spectra.

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