The program includes an interactive explanation of how to use the program. Draw a hill with the mouse, place a block on the hill, give it an initial speed, and watch it move. While the block moves, bar graphs display the kinetic, potential, and total energy. At the beginning of the program, the program makes a measurement to determine the animation step size, so the animation runs at about the same speed on fast and slow computers. Place lens and mirrors along a bench, then flash a light.
Rays spread out and are bent by the optical elements, producing a spot on a piece of film.
There is an interactive explanation of how to use the program. Study the quantum behavior of an electron in various kinds of potential wells. If the well is symmetrical, the bound states have symmetrical wave functions. If you don't have this equipment, use the mouse to make motions that are graphed on the screen. The program voltage uses the ULI to plot voltage as a function of time.