Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsSpontaneous Emission in a Free-Electron Laserhttp://demonstrations.wolfram.com/SpontaneousEmissionInAFreeElectronLaser/]]>http://demonstrations.wolfram.com/SpontaneousEmissionInAFreeElectronLaser/