Falstad Teaching Applets
These are some educational applets to help visualize various concepts in math, physics, [chemistry,] and engineering. They were originally written in Java, but they’ve mostly been converted to Javascript, so you should be able to view them without a Java-capable browser.
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.
Thermodynamics
Gas Molecules Simulation Applet: Demonstrates the kinetic theory of gases.
Heat Engine: Carnot cycle and other thermodynamic cycles.
Oscillations and Waves
Ripple Tank (2-D Waves) Applet: Ripple tank simulation that demonstrates wave motion, interference, diffraction, refraction, Doppler effect, etc.
2-D Waves Applet: Demonstration of wave motion in 2-D.
3-D Waves Applet: Demonstration of wave motion in 3-D.
Coupled Oscillations Applet: Demonstration of longitudinal wave motion in oscillators connected by springs.
Dispersion Applet: Dispersion and group velocity.
Location
License
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