Move Ef using the arrow button or mouse drag and observe the effect. You can thus experiment with how an RGB color is affected by its components. The figures represent the growth of blue atoms on a substrate consisting of red atoms. Visualization of diffusion, drift and recombination of excess minority carriers in a semiconductor. Complete explanations of the theory and how the applet works are given.
Source code is available.
This applet shows how atomic velocities cause the Brownian Motion of a dust particle. In one panel a small ball jitters. In the next, we see that it jitters because many smaller balls bat it rapidly about. This site contains free samples which you are free to use in your learning or teaching, as well as information on ordering the full package. FUN is available for both group and individual use, and there's a version that runs on the World Wide Web.