n. an instrument 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.
n. an instrument (a *spectrometer or *spectroscope) that produces a photographic record (spectrogram) of the intensity and wavelength of electromagnetic radiations.... spectrograph
n. any instrument for measuring the intensity and wavelengths of visible or invisible electromagnetic radiations. See also spectroscope.... spectrometer
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