Scattering by individual transparent spheres

Scattering intensity functions of individual droplets of dioctyl phthalate (refractive index, 1.4830), phenyl methyl siloxane (refractive index, 1.5559), and pentaphenyl ether (refractive index, 1.6309) illuminated with 6328-A radiation from a He-Ne laser were measured over the size range from 7.5-micro to 110-micro-diam. Within the limits of experimental error the results are shown to be in good agreement with Mie theory.

A prototype cloud physics laser nephelometer

The design and performance characteristics of a prototype cloud physics laser nephelometer are described. The instrument measures radiation scattered from individual cloud droplets, determining droplet concentrations from scattered light-pulse count rates and size distributions from pulse amplitudes.

Strategy training and practice in disjunctive concept attainment

64 Ss attained a series of three disjunctive concepts in an instance-selection procedure. Training in the appropriate strategy facilitated performance as compared with instructions which simply specified that the concept was disjunctive. A practice effect was obtained under both instructional conditions. A negative example card led to greater efficiency.