  Scattering by particles significantly smaller than the wavelength is an
important physical process in the rocky bodies in our solar system and beyond.
A number of observations of spectral bluing (referred to in those papers as
"Rayleigh scattering") on planetary surfaces have been recently reported,
however, the necessary mathematical modeling of this phenomenon has not yet
achieved maturity. This paper is a first step to this effect, by examining the
effect of grain size and optical index on the albedo of small conservative and
absorbing particles as a function of wavelength. The basic conditions necessary
for spectral bluing or reddening to be observed in real-world situations are
identified. We find that any sufficiently monomodal size distribution of
scattering particles will cause spectral bluing in some part of the EM spectrum
regardless of its optical index.
