Twisted Cord Illusion This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet. Buy this applet A few words. Copyright © 1996-2008 Alexander Bogomolny                   The parallel lines do not often look parallel. The first figure depicts the so called Twisted Cord illusion, the second the Brick Wall one (needs rotating through 90o.) The latter has a page of its own. References A. Seckel, The Art of Optical Illusions, Carlton Books, 2000 (#30) Copyright © 1996-2008 Alexander Bogomolny

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