I would like to know how to simply construct a plane wave using Huygens' Principle, that each point on a wavefront can be regarded as a source of waves emanating from that point in every direction. I am okay with it being created in the 'forward' and 'backward' directions, as this can be eliminated using an obliquity factor.
I have seen this question, and am not sure whether or not new sources need to be created at each instant of time. What wavelengths for the sources need to be used?
Do we have infinite lines of sources (wavefronts) moving at the velocity of the plane wave, in the direction of the propagation of the plane wave?