08250 IUPAC Gold Book - Fresnel reflection 10.1351/goldbook.08250 08250 current 1 Reflection of radiation from a surface that is smooth and large with respect to the wavelength of the radiation. A reflected beam, of intensity governed by the Fresnel equations, is produced at an angle of reflection equal to the angle of incidence. May be termed specular reflection for non-scattering samples. Reflection https://goldbook.iupac.org//terms/view/08281 radiation https://goldbook.iupac.org//terms/view/08242 specular reflection https://goldbook.iupac.org//terms/view/08292 wavelength https://goldbook.iupac.org//terms/view/08299 PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 660 (https://doi.org/10.1515/pac-2019-0203) https://goldbook.iupac.org/terms/view/08250/html https://goldbook.iupac.org/terms/view/08250/json https://goldbook.iupac.org/terms/view/08250/plain Citation: 'Fresnel reflection' 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.08250 The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. 2026-05-30T21:05:18+00:00