## specular reflectance (reflection factor), $$\rho$$

in optical spectroscopy
https://doi.org/10.1351/goldbook.S05851
@R05046@ specularly reflected from the surface of a system, $$P_{\mathrm{refl}}$$, divided by the incident @P04792@, $$P_{0}$$: $\rho =\frac{P_{\mathrm{refl}}}{P_{0}}$
Source:
PAC, 1985, 57, 105. (Names, symbols, definitions and units of quantities in optical spectroscopy (Recommendations 1984)) on page 115 [Terms] [Paper]