Title: optical spectroscopy
Long Title: IUPAC Gold Book - optical spectroscopy
DOI: 10.1351/goldbook.O04314
Status: current

Definition
The study of systems by the electromagnetic radiation with which they interact or that they produce. By convention, spectroscopic properties are expressed in terms of wavelength in vacuo, not the wavelength within the medium being studied.

Related Term
- wavelength: https://goldbook.iupac.org//terms/view/W06659

Source
- PAC, 1985, 57, 105. 'Names, symbols, definitions and units of quantities in optical spectroscopy (Recommendations 1984)' on page 107 (https://doi.org/10.1351/pac198557010105)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/O04314/html
- json: https://goldbook.iupac.org/terms/view/O04314/json
- xml: https://goldbook.iupac.org/terms/view/O04314/xml

Citation: Citation: 'optical spectroscopy' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.O04314
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Accessed: 2026-06-20T04:45:28+00:00