(a) Real part of the surface charge density for prolate shells of differing shell thicknesses (5%, 10%, 15%, 20%, 25%) with a fixed aspect ratio (2 to 1) for a longitudinally incident field. The dashed curve is the charge density of the solid prolate spheroid. In each case, the charge density is evaluated at the blunt end (ϑ = 0°) of the shell.
(b) Imaginary part of the prolate longitudinal response for different shell thicknesses.