Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site pur-ee.UUCP Path: utzoo!watmath!clyde!floyd!harpo!ihnp4!inuxc!pur-ee!kk9w 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