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From: kk9w@pur-ee.UUCP (Andersen)
Newsgroups: net.physics
Subject: Babinet's Principle
Message-ID: <1648@pur-ee.UUCP>
Date: Thu, 1-Mar-84 10:01:37 EST
Article-I.D.: pur-ee.1648
Posted: Thu Mar  1 10:01:37 1984
Date-Received: Sat, 3-Mar-84 07:37:46 EST
Organization: Electrical Engineering Department , Purdue University
Lines: 8

Babinet's principle is just sort of a fancy way of saying all diffraction
gratings (, waves, structures, etc) with the exact same periodicity only
differ by a dc value.  In other words, to get a square wave of period 1
and duty cycle .5 with a high value of 1 and a low value of 0 you would use
the same fourier series as you would to get the same square wave with max
value .5 and min value -.5 except you would add .5 to the dc term.

Dave