Double Wells and Covalent Bonds is a physics simulation model. It was created by the Department of Physics of the University of Colorado. It is written in Java, so it runs on most operative systems and it can even be run by your web browser without installing it. This particular simulation is a very complex one. I dare to say it is one of the most complex simulations I have downloaded from the PhET website. Fortunately, there is a teaching guide written by PhET staff that shows the main topics and learning points of this simulation.
Basically, the simulation shows a wave function for different energies. The user has to click one of the green lines that appear on the main window, and each one of those will result in a different wave function at the bottom. You can activate a magnifying glass, but I think it is available for decorative purposes more than anything.
The main topics that are illustrated with this simulation are: tunneling, splitting, spin 1/2 particles, ammonia particles, wells and bonding.
I think advanced students of physics will benefit more from this simulation than beginners. I honestly didn't understand much of it.
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