The various theories of diffuse reflectance spectroscopy are compared mathematically, and it is concluded that the modified particle model theory is probably the most nearly correct. If so, the comparison shows that the simple, easily applied simplified particle model theory is approximately valid for relative index of refraction values of 1.5-2.5 and that the Kubelka-Munk remission function is approximately applicable in the traditional sense. Expressions were obtained for the Kubelka-Munk constants in terms of the fundamental optical parameters, and the depth of penetration of radiation into a powdered sample was investigated.
The Kubelka-Munk theory of reflectance spectroscopy is used to derive an approximate equation that describes the rate of the photoprocess of a powdered sample in terms of the remission function. The equation is compared with one obtained using the particle model theory of diffuse reflectance and with experimental data for the photochemical reaction of powdered K(3)[Fe(C(2)O(4))(3)]-3H(2)O.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.