following images: File:Onde_plane_3d.jpg licensed with PD-self 2006-09-21T22:41:13Z Fffred 356x214 (14539 Bytes) A planewave (the planes should be infinite)
DescriptionInhomogenious planewavewavefronts3D.svg Deutsch: Vergleich zwischen inhomogener und homogener ebener Welle English: Comparison of inhomogenious