Noun
An optical instrument for forming and examining spectra (as that of solar light, or those produced by flames in which different substances are volatilized), so as to determine, from the position of the spectral lines, the composition of the substance.
Source: Webster's dictionaryJoseph von Fraunhofer developed the first modern spectroscope by combining a prism, diffraction slit and telescope in a manner that increased the spectral resolution and was reproducible in other laboratories. Source: Internet
It was based on the same principle as the spectroscope, but it had a camera in place of the viewing tube. Source: Internet
It was the first eclipse expedition in which a spectroscope was used. Source: Internet
These three lines can be observed superimposed on the white continuum using a hand spectroscope, for light emitted by the usual white fluorescent tubes. Source: Internet