OpenPhysics

AC phasor simulation exploring resistors, inductors, and capacitors across four screens — Intro (single element), Series RLC, Resonance, and Power.

Explore the Carnot cycle across three screens: a piston-cylinder tied to a live PV diagram, a quantitative efficiency lab with a T–S view, and the same cycle reversed as a refrigerator or heat pump.

Explore crystal structure across five screens: the five 2D Bravais lattices, cubic unit cells and packing factors, hexagonal vs cubic close packing, Miller indices, and aperiodic order — Penrose tilings and the hat monotile, with diffraction as sharp as a crystal's but a symmetry no crystal can have.

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

Explore Maxwell boundary conditions for E/D and B/H at a planar interface between two media.

Flow past an obstacle, from laminar streamlines to a Kármán vortex street to a turbulent wake — real-time GPU fluid simulation across Intro and Lab screens.

Heat as a field on a WebGPU engine — temperature, conduction, convection, transport balance, and materials across five screens, with GPU-native compute shaders and a CPU reference backend.

Physical-optics simulation of Michelson, Mach-Zehnder, and Fabry-Perot interferometers: optical path length, phase, coherence, and fringe formation.

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.

Single-screen SceneryStack bench oscilloscope. Display a synthetic function-generator signal or live microphone audio on a phosphor-green CRT graticule, with two channels, triggering, X-Y and FFT modes, measurement cursors, and live auto-measurements.

Interactive map of the Earth's tectonic plates drawn entirely from real data — PB2002 plate boundaries, USGS earthquakes, Holocene volcanoes and NOAA relief — plus cross-sections through a subduction zone, a spreading ridge and a transform fault, and a reconstruction clock running 50 Myr either side of the present. Two further screens port the tabs of PhET's Java simulation: crustal isostasy, and the evolution of a convergent or divergent plate boundary.

Rigid-body dynamics of a spinning gyroscope: steady precession under gravity, nutation, and torque-free tumbling.

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.

Explore special relativity across five screens: a moving light clock, an interactive Minkowski spacetime diagram, length contraction (ladder and barn), the twin paradox, and the relativistic Doppler effect.

Longitudinal standing waves in a pipe: displacement, velocity and pressure phase relationships, open vs. closed end reflection, and the harmonic series of open and stopped pipes.

Interactive Stern–Gerlach experiment: assemble analyzers, magnets, and counters; fire spin-½ / spin-1 atoms; compare Monte Carlo counts with analytic quantum predictions.

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

Learn to read vernier calipers and vernier scales in general.

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

SceneryStack planetarium renderer. Project the night sky for an observer on Earth from latitude, longitude, and local sidereal time.

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.

SceneryStack port of the NAAP 'Basic Coordinates and Seasons' lab. Explore terrestrial and celestial coordinates and how Earth's axial tilt produces the seasons across three screens.

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 'Motions of the Sun' lab. Trace the Sun's daily path, compare sidereal and solar time, and explore the zodiac on the celestial sphere.

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.