1. α = πD/λ, where D is the diameter of the spheres, λ is the wavelength in the medium, and m = μ2/μ1, where μ1 and μ2 are the refractive index of medium and particle, respectively.
2. (a) W. Heller and W. J. Pangonis, J. Chem. Phys. 26, 498 (1957); JCPSA60021-9606
3. (b) W. Heller and H. J. McCarty, J. Chem. Phys. 29, 78 (1958).JCPSA60021-9606
4. Lord Rayleigh, Phil. Mag. 12, 81 (1881).PHMAA40031-8086
5. Lord Rayleigh, Proc. Roy. Soc. (London) A84, 25 (1911); PRLAAZ0950-1207