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Propagation of Waves - RIT Center for Imaging Science
www.cis.rit.eduPROPAGATION OF WAVES 7.1.2 Cylindrical Waves If a wave is emitted from a line source, the wavefronts are cylindrical. Since the wave expands to Þll a cylinder of radius r0, the wavefront crosses a cylindrical area that grows as Area =2πrh ∝ r.