No textbook explains why a double pendulum turns chaotic. No lecture shows you the Lorenz butterfly diverge. Physim does. Adjust any parameter — watch the universe respond instantly.
The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.
Physics is like sex: sure, it may give some practical results, but that's not why we do it.
Not only is the universe stranger than we think, it is stranger than we can think.
Textbooks tell you F = ma. Physim lets you feel what happens when you double the mass mid-flight, flip on gravity at 0.3g, or watch two pendulums drift into chaos from identical starting points.
Every simulation responds to your input in real time. Change gravity, flip a quantum detector, set chaos in motion — and see the effect instantly.
Real equations power every animation. Projectiles follow Newtonian mechanics. The double slit uses actual quantum diffraction math. RK4 integrators for chaotic systems. No shortcuts.
Designed for curious minds, not just physics majors. Plain-language descriptions, intuitive controls, and guided "key insight" callouts for every simulation.
Zero dependencies. Zero frameworks. Pure HTML, CSS, and JavaScript. Loads in milliseconds and runs at 60 fps on any modern device — even on slow connections.
A curious student, an advanced hobbyist, and a physics professor can all find value. Intuition first, equations available on demand in every simulation.
Every simulation has a stable hash URL. Share an exact parameter configuration with students, colleagues, or the world — reliably, every time.
Classical mechanics. Quantum wave functions. Chaos attractors. N-body gravity. Phase transitions. Each simulation is handcrafted — real equations, real physics, zero shortcuts.
13 simulations. Real equations. Instant answers. Opens in 1 second on any device.
⚡ Open Physim — it's liveBookmark it. Share it. Come back tomorrow for a new challenge.
What physics topic would you love to explore interactively? Every suggestion is read.