OpenPhysics

Interactive simulation of the Doppler Effect — visualizes how the frequency of sound waves shifts with relative motion between source and observer.

Interactive simulation of how light propagates through polarizers and wave plates — Intro, Polarization, Wave Plates, and Lab screens.

Web-based geometric optics simulation. Supports ray sources, parallel and divergent beams, mirrors, lenses, beam splitters, and refraction interfaces.

Collection of four classical mechanics simulations exploring oscillations and chaos: single spring, double spring, pendulum, and double pendulum.

Drag-and-drop quantum circuit builder with a live state simulator. Place quantum gates and watch probabilities, amplitudes, Bloch spheres, and measurements update in real time.

Interactive simulation of resonance in driven oscillating systems. Visualizes driven mass-spring systems and Chladni plate patterns.

Browser-based video motion-analysis tool. Load a video, calibrate real-world distances, and auto-track objects across frames using computer vision.

Three-screen VoceVista-style real-time voice-analysis simulation. Analyzes microphone input for waveform, spectrum, and composition.

SceneryStack port of the PhET 'Electric Field of Dreams' simulation. Place charged particles and observe Coulomb interactions and an adjustable uniform external field.

SceneryStack port of the PhET 'Ladybug Motion 2D' simulation. Explore 2D motion, position, velocity, and acceleration using a ladybug on a rotating platform.

SceneryStack port of the classic PhET Flash 'Lunar Lander' simulation. Pilot a lunar module to a soft landing by managing thrust and tilt against gravity.

SceneryStack port of the PhET 'Maze Game' simulation. Drive a particle through tile-based mazes using position, velocity, or acceleration control modes.

SceneryStack port of the PhET Java 'Moving Man' simulation. Explore 1D kinematics by dragging a man or using position/velocity/acceleration sliders.

SceneryStack port of the PhET 'Radio Waves & Electromagnetic Fields' simulation, rebuilt from the legacy PIXI.js + Backbone version. Wiggle an electron and watch EM radiation propagate.

SceneryStack port of the PhET Java 'The Ramp' simulation. Explore forces on an inclined plane with friction, energy conservation, and applied forces. Features record/playback, force charts, and comparison objects.

Interactive simulation of two exoplanet-detection methods — radial velocity (Doppler wobble) and transit (light-curve dip).

SceneryStack port of the NAAP 'Habitable Zones' lab. Compare circumstellar and galactic habitable zones with orbiting planets in two screens: Circumstellar and Galactic / Milky Way Habitability.

SceneryStack port of the NAAP 'Rotating Sky' lab. Explore how the sky appears to rotate for an observer on Earth through a horizon system, a celestial sphere, and a combined interactive explorer.

SceneryStack port of the NAAP 'Solar System Models' lab. Compare the Earth-centered Ptolemaic model (deferent and epicycle) with the Sun-centered system and the planetary configurations it produces.

SceneryStack port of the NAAP 'Variable Star Photometry' lab. Register CCD star-field images, blink-compare epochs, perform aperture photometry, and find periods from a differential-magnitude light curve.