Learning apps

A growing collection of small games, visual explorations, and interactive widgets for learning.

Logic Gates

Flip the input switches so every output lamp matches its goal pattern in as few moves as possible.

See how gravity, friction, and force interact.

Launch a ball and watch gravity shape the arc.

Swing a pendulum and watch energy trade places.

Move a source past a listener and watch the wavefronts compress and stretch.

Pick a lens or mirror, drag the object, and watch the principal rays form the image.

Aim a laser and watch refraction bend the beam.

Drive a string and watch waves reflect.

Pick the slit count, sweep wavelength and slit spacing, and read the principal maxima off the screen.

Drag sources, switch between iron-filings and field-line views, and read the local field with a draggable compass.

Explore the planets, the Moon's phases, and eclipses in one 3D model.

Drag the mirrors so the laser reflects off them and reaches the glowing target.

Watch chaos emerge from two coupled pendulums.