Magnetism 3D Lab

What it does

Build electromagnetic scenes in your browser — wires, solenoids, magnets, charged particles — and watch the field come alive in 2D and 3D: heatmaps, iron filings, field lines, Lorentz-force trajectories. Free, no install, runs on Chromebooks. Made for AP Physics, IB, and university E&M. It's the field lab that's been in physics classrooms since 2003 — now rebuilt browser-native.

• IP
  Interactive physics simulations I built while teaching my daughterJan 2026 · projectlumen.app · ▲87

  I started teaching my daughter physics by showing her how things actually work - plucking guitar strings to explain vibration, mixing paints to understand light, dropping objects to see gravity in action. She learned so much faster through hands-on exploration than through books or videos. That's when I realized: what if I could recreate these physical experiments as interactive simulations? Lumen is the result - an interactive physics playground covering sound, light, motion, life, and mechanics. Each module lets you manipulate variables in real-time and see/hear the results…

• AS
  A simple 2D fluid and gravity simulation with WASM and WebGL2024 · aestuans.github.io · ▲137

  The little particles will gravitate to your cursor (or touch location), and can even enter stable orbits if the conditions are right! Mainly an excuse for me to experiment with wasm and WebGL, but it makes for a surprisingly good fidget toy.

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• SB
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• IB
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