Longtinual Wave Wave Function Java Applet :
http://home.phy.ntnu.edu.tw/~lookang/EJS_4.1_090122/WaveFunctionPlotterLongitinualwavewee02.html

Some physics is not making sense, can comment what is strange?






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some reference
http://www.antonine-education.co.uk/physics_a2/module_4/Topic_4/graphical_representation_of_wave.htm