Diffraction by an acoustically transmissive or an electromagnetically dielectric half‐plane

This work gives a mathematical model for an acoustically penetrable or electromagnetically dielectric half‐plane. An approximate boundary condition is used that depends on the thickness of, and the material constants for, the half‐plane. A solution is obtained, by using the approximate boundary condition, for the problem of a line source field diffracted by a penetrable/dielectric half‐plane. The asymmetry of the approximate boundary condition results in a matrix Wiener–Hopf problem, which is solved explicitly.