Via: buddhazooka
#016: Invisible Magnetic Watch
Blogger buddhazooka stumbles across this amazing magnetic watch which uses iron filings for the hands:
The minute hand and main hand is magnetic, hidden behind a plate sprinkled powdered iron. By shaking the watch, powdered iron will gathering around the hands, time becomes “visible” from no shape.
That’s very, very cool. We know what we want for Christmas now! Iron filings make a great learning tool to help visualise magnetic fields, and now they’re also stylish.
