spectrometer

A spectroscope equipped with scales for measuring wavelengths or indexes of refraction.

An instrument used chiefly to measure the angular deviation of light-rays in passing through a prism, and hence to determine the refractive indices of the substance of which the prism is formed.

A spectroscope fitted for measurements of the luminious spectra observed with it.

An optical instrument for measuring the absorption of light by chemical substances; typically it will plot a graph of absorption versus wavelength or frequency, and the patterns produced are used to identify the substances present, and their internal structure.

spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer