The Magnetism Museum
From lodestones to MRI machines — how invisible forces shape our world. Visualize magnetic fields, explore 32 artifacts, and play with electromagnets.
Magnetic Field Visualizer
Click the canvas to place poles. Drag to reposition. Field lines flow from N (red) to S (blue) — the same iron-filing pattern Faraday sketched in the 1830s, computed in real time.
Iron filings align along the lines because each filing becomes a tiny induced bar magnet — the field reveals itself through countless small witnesses.
The Collection
32 artifacts spanning 2,600 years of magnetic discovery — from lodestones to superconducting accelerator magnets. Click any card to copy its description.
No artifacts in this category.
26 Centuries of Magnetism
Key milestones from 600 BC to the 2020s — from Thales's lodestone to the LHC's superconducting dipoles.
Hands-on Instruments
Build an electromagnet from first principles, convert between four common magnetic units, and find the temperature at which each ferromagnet loses its magnetism.