Interactive Lab
Physics you can grab and turn. Each simulator runs live in the browser — no install, no account, nothing leaves your machine.
The most expensive mystery device of the twentieth century, decoded: a copper cone coil, an axial magnet, twelve volts DC. The cone's twisted vector potential crossed with the magnet's static field gives the space around the box a handedness — the helicity density h = A·B. The program's "left" and "right" torsion fields are its sign.
Flip the polarity switch and watch the helicity ledger: the magnet-crossed term reverses sign, the coil's own term does not. Switch the winding order between a plain conical spiral and the double-wound form — the wire itself a small helix laid along the cone, with its own winding sense. Remove the magnet and the switch stops mattering. Turn on the audio modulation and the E·B pump starts driving H. The full decode is in the article "Torsion Field = Helicity Density".
3D WebGL — desktop with a mouse recommended. Drag to orbit, right-drag to pan, scroll to zoom. Keys: P polarity, O power, M modulation.
Launch simulator →
Why does an induced current always oppose its cause? Lenz's law is usually taught as a rule to memorize. This simulation shows the mechanism instead: the vector potential A carries field momentum, and the charges in the second coil ride it like a treadmill. Watch canonical momentum p = mv + qA hold in the lossless case — and watch resistance break it.
Two coupled coils in 3D. Toggle A, B, E and Poynting field layers, slice the volume, scrub time, and follow the energy streamlines from source to sink.
3D WebGL — desktop with a mouse recommended. Drag to orbit, right-drag to pan, scroll to zoom.
Launch simulator →