Term: monochromator
https://doi.org/10.1351/goldbook.M04009

Definition:
Optical device that transmits a mechanically selectable narrow band of wavelengths of electromagnetic radiation chosen from a wider range of wavelengths available at the input.

Note: To spatially separate the wavelengths, a monochromator can use either the phenomenon of optical dispersion in a prism, or that of @D01711@ using a grating.

Related Terms:
1) diffraction (http://doi.org/10.1351/goldbook.D01711).

Source: PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 372 (https://doi.org/10.1351/pac200779030293)

Citation: 'monochromator' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.M04009

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