#JavaScript version
http://iwant2study.org/ospsg/index.php/interactive-resources/physics/04-waves/04-light/117-light-intensity-simulation
[img]http://iwant2study.org/lookangejss/04waves_13light/ejss_model_thinlensintensitywee/Light%20intensity/2015-05-22_1621s.png[/img]