Cake-stand magnetometer

With patience and a bit of wiggling, you can detect the magnet from nearly nearly three metres away. Which is astonishingly sensitive for a cake stand.

TV presenter & props chap Marty Jopson built a magnetometer using a laser pointer, a fridge magnet, and an Ikea cake stand. It was used a few weeks ago on BBC Stargazing Live.

(via Marty on Twitter).

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