an optical device that transmits a mechanically selectable narrow band of wavelengths of light or other radiation chosen from a wider range of wavelengths available at the input.
spectrophotometer 1
noundomain: artefact
Princeton WordNet [ver.3.1]
English
Definition
a photometer for comparing two light radiations wavelength by wavelength
an optical device that transmits a mechanically selectable narrow band of wavelengths of light or other radiation chosen from a wider range of wavelengths available at the input.