Wolfram Demonstrations Projecthttp://demonstrations.wolfram.com/An Open Resource of Interactive Mathematica VisualizationsCopyright 2009 Wolfram Demonstrations Project & ContributorsRadiation Shielding of a Spherical Black Bodyhttp://demonstrations.wolfram.com/RadiationShieldingOfASphericalBlackBody/]]>http://demonstrations.wolfram.com/RadiationShieldingOfASphericalBlackBody/