Abstract

Theoretical light-scattering coefficients, Kt(m,α), for spherical particles have been computed for values of m of 0.8, 0.9, and 0.93, where m is the ratio of the index of refraction of the particle with respect to the surrounding medium. Values of α (circumference of the particle divided by the wavelength of the incident beam) range from 1 to 200.

The coefficients, Kt(m,α), may be reduced to a single curve, Kt(L′), by means of the Lorenz-Lorentz relation which facilitates interpolation for values of m between 0.8 and 0.93. The Kt(L′) curve has a shape similar to the corresponding curve for ratios of refractive indexes greater than unity, but the primary peak is significantly lower.

For totally reflecting spheres (m=∞) the value of Kt in the range of α between 1 and 90 oscillates about a value of Kt=2.10 (±5 per cent).

The coefficients were calculated and checked by high-speed computers.

© 1954 Optical Society of America

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