Optical constants from single-particle measurements

One is a mixture of 1 % by particle volume of spherical absorbers with radius 0.05 jum and refractive index mbl = 1.7 + /0.7, which is appropriate to a form of carbon, and 99% by volume of larger particles with mwh = 1.55 + /10-6, which is roughly appropriate to several possible aerosol components. The subscripts bl (black) and wh (white) indicate how separate collections of these two kinds of particles would appear. Among the many optical constants reported for carbon in its various forms we have chosen those obtained from single-sphere measurements by Pluchino et al. (1980). 

---