There is background information related to this article (especially wave theory and Mie scatter) in two recent articles of “Theoretically Speaking …”NIR news16(5), 8–9 (2005) and NIR news16(8), 8–9, 14 (2005).
3.
We have published the equations to do this in many places. For example: DahmDonald J. and DahmKevin D., “Representative Layer Theory for Diffuse Reflectance”, Appl. Spectrosc.53, 647–654 (1999).