This is an applet which demonstrates the behavior of one-dimensional scattering solutions of the Schroedinger equation.

The upper panel shows the potential. Drag any segment of the heavy blue line to change the potential. The arrows to left and right indicate the energy of the scattering state. Drag these up or down to change the energy. To observe the time evolution of the state, press the "Animate" button. The bottom panel shows the wavefunction, with the real part drawn in blue, and the imaginary part drawn in the red dashed line. The electron mass used corresponds to that of electrons in GaAs.

Note for students: There are no calls to the cos, sin, or exp functions in this applet, only simple arithmetic and sqrt are used.

Applet developed by Richard Castro, based upon C code by W. R. Frensley.