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Software Requirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below



Wolfgang Christian; Tan Wei Chiong; lookang

Sample Learning Goals


For Teachers

This simulation depicts the spreading of a free particle's wavefunction, as predicted by the Schrödinger equation. You can view the particle's momentum or position by changing the option in the simulation, and toggle between a normal filled graph and a graph that shows real/imaginary parts of the wavefunction with the Re/Im option. In addition, the uncertainty σ of the particle's momentum and position can be adjusted with the slider provided.

Note how the speed at which the wavefunction spreads changes with the uncertainty. Also note that the integral of the squared modulus of the wavefunction (the integral of the probability density function a.k.a. area under the curve) is always a constant 1.






  1. improved version with joseph chua's inputs
  2. original simulation by lookang

Other Resources


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