diffuse reflectance symbol: R

Synonyms: remission fraction, remittance
https://doi.org/10.1351/goldbook.08235
Diffuse reflected (remitted) radiant power (Prem) divided by incident radiant power (P0). R=Prem/P0.
Notes:
  1. The sum of remittance, transmittance, and absorptance equals one.
  2. Some authors distinguish between remittance and diffuse reflectance by excluding specular reflection in the latter.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 655 [Terms] [Paper]
Citation: 'diffuse reflectance' 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.08235 RIS BibTex EndNote
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