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Some educational java applets to help visualize various concepts in math, physics & engineering.

Quantum Mechanics

Hydrogen Atom Applet
Shows the orbitals (wave functions) of the hydrogen atom.
Molecular Orbitals Applet
Shows the orbitals (wave functions) of the hydrogen molecular ion.
1-D Quantum Mechanics Applet
Single-particle quantum mechanics states in one dimension.
1-D Quantum Crystal Applet
Periodic potentials in one dimension.
2-D Quantum Crystal Applet
Periodic potentials in two dimensions.
1-D Quantum Transitions Applet
Radiative transitions (absorption and stimulated emission) in one dimension.
Atomic Dipole Transitions Applet
Radiative transitions (absorption and stimulated emission) in atoms.
2-D Rectangular Square Well Applet
Rectangular square well (particle in a box) in two dimensions.
2-D Circular Square Well Applet
Circular square well in two dimensions.
2-D Quantum Harmonic Oscillator Applet
Harmonic oscillator in two dimensions.
Quantum Rigid Rotator Applet
Particle confined to the surface of a sphere.
3-D Quantum Harmonic Oscillator Applet
Harmonic oscillator in three dimensions.