Fresnel reflection

https://doi.org/10.1351/goldbook.08250
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.
Note:
May be termed specular reflection for non-scattering samples.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 660 [Terms] [Paper]