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Fig. 2. Effect of the relative size, x, at a fixed wavelength (0.55 µm in air) on the attenuation efficiency, Qc, and absorption efficiency, Qa of a microsphere according to Mie theory. The attenuation efficiency is shown for a spherical seawater droplet in air (oscillating light blue curve with a high-frequency ripple, salinity of 35.5, relative refractive index, m = 1.343 - 0i, Δx ~ 0.1), a spherical air bubble in seawater (oscillating gray curve, m = 0.745, Δx ~ 1), and a voidless carbon sphere in air (smooth black curve, m = 1.95 - 0.79i, Δx varies from 0.01 to 1). The absorption efficiency for carbon in air is shown with the orange curve. Absorption efficiencies for the two other cases vanish because the refractive indices of the particles are real. All efficiencies were calculated with the MJC Light Scattering Calculator for Homogeneous Spheres. Note that plotting the efficiencies as functions of the phase shift parameter (Fig. 3) reveals certain regularities in the size-dependent Mie patterns, hidden here.
| CITATION: Jonasz M. 2006. Mie theory: Particle size-dependent patterns (www.tpdsci.com/Tpc/MiePtnSz.php). In: Top. Part. Disp. Sci. (www.tpdsci.com). |
HISTORY: Published: 03-Mar-2006 Modified: 08-Jun-2006 Peer-reviewed: PENDING |
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