Wave packet impinging on a single slit. (The colors represent information about the complex phase of the wave function.)	Wave packet impinging on a double slit	Wave packet of higher energy impinging on a double slit
These animations represent numerical solutions of the free-particle Schrödinger equation using Dirichlet boundary conditions to represent the impenetrable barrier. Adapted from Visual Quantum Mechanics, Bernd Thaller (Springer, 2000).