<p>The quantum wavefunction of a particle in a 3D box of dimensions L<sub>x</sub>, L<sub>y</sub> and L<sub>z</sub>. The wavenumbers are:
</p>
<ul><li><i>n<sub>x</sub></i>=2</li>
<li><i>n<sub>y</sub></i>=1</li>
<li><i>n<sub>z</sub></i>=1</li></ul><p>This plot is arranged as a number of slices parallel to the <i>x-y</i> plane, increasing <i>z</i>.
</p>
White represents the highest value of ψ(<b>r</b>), black the lowest and grey zero.
<a href="//commons.wikimedia.org/wiki/User:Inductiveload" title="User:Inductiveload">Inductiveload</a>
Own drawing, plotted in Mathematica.