monochromatorn.
/ˈmɒnə(ʊ)krəmeɪtə/, /ˌmɒnə(ʊ)ˈkrɒmᵻtə/, U.S. /ˌmɑnəˈkroʊmeɪdər/ Physics.
A device used to select radiation of a single wavelength or energy (or, in practice, a very narrow range of wavelengths or energies).
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the world > matter > physics > atomic nucleus > radioactivity > X-rays > study of crystals by X-rays > [noun] > diffraction by crystal atoms > spectrometer used in
monochromator1909
the world > matter > physics > atomic nucleus > radioactivity > X-rays > study of crystals by X-rays > [noun] > reduction to single wavelength or energy > crystal causing
monochromator1909
1909 Chem. Abstr. 3 2074 The monochromator is a spectrometer arrangement of the Pellin and Broca or Hilger type with constant deviation of 90°, in which the eyepiece can be replaced by a second slit.
1924 E. C. C. Baly Spectrosc. (ed. 3) I. iv. 109 Any fixed arm spectrometer can be converted into a monochromator by replacing the eyepiece by a slit placed in the focus of the telescope lens or mirror.
1969 Nature 11 Oct. 146/1 Changes in diffraction geometry, and more especially the use of focusing monochromators, should yield a considerably higher neutron flux, permitting the use of smaller crystals.
1994 Acta Paediatrica 83 7 Cultured cells..were..irradiated with visible light of different wavelengths, either from phototherapy lamps or from a Xenon/Mercury lamp equipped with a monochromator.
This entry has been updated (OED Third Edition, December 2002; most recently modified version published online March 2022).
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n.1909