Posted by Penguin on December 21, 2005 at 16:18:31:
In Reply to: Good point posted by Lew on December 21, 2005 at 11:44:08:
I just postulate that based on my ancient college physics memories :-). But it kinda makes sense, because a radiating surface cannot be a line, the line has to be at the focal point of the surface curvature.
dee
;-D