https://doi.org/10.1351/goldbook.08235
Diffuse reflected (remitted) radiant power (\(P_{\rm{rem}}\)) divided by incident radiant power (\(P_{0}\)). \(R = P_{\rm{rem}}/P_{0}\).
Notes:
- The sum of remittance, transmittance, and absorptance equals one.
- Some authors distinguish between remittance and diffuse reflectance by excluding specular reflection in the latter.