Diffraction as a Consequence of Faraday's Law
arXiv:physics/0003057 · doi:10.1119/1.19511
Abstract
We consider a linearly polarized electromagnetic wave incident on an opaque screen with square aperture of edge a. An application of Faraday's law to a loop parallel to the screen, on the side away from the source, shows that the wave must have longitudinal components there. The ratio of the longitudinal to transverse field is a measure of the diffraction angle.
v2 fixes a typo