<p>The quantum wavefunction of a particle in a 2D box of dimensions L<sub>x</sub> and L<sub>y</sub>. The wavenumbers are:
</p>
<ul><li><i>n<sub>x</sub></i>=2</li>
<li><i>n<sub>y</sub></i>=2</li></ul>
White corresponds to a high value, black low values and mid-grey zero.
<a href="//commons.wikimedia.org/wiki/User:Inductiveload" title="User:Inductiveload">Inductiveload</a>
2007-02-13
This  diagram was created with <a href="https://en.wikipedia.org/wiki/Mathematica" class="extiw" title="w:Mathematica">Mathematica</a>.