Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRefraction through a Rotating Glass Slabhttp://demonstrations.wolfram.com/RefractionThroughARotatingGlassSlab/]]>http://demonstrations.wolfram.com/RefractionThroughARotatingGlassSlab/