Weird In Stock
A windmill that runs on lightA windmill that runs on lightA windmill that runs on lightA windmill that runs on lightA windmill that runs on lightA windmill that runs on lightA windmill that runs on lightA windmill that runs on light

A windmill that runs on light

Crookes radiometer

Four vanes inside a sealed glass bulb, black on one side and silver on the other. Put it in a sunny window and they turn, with nothing touching them. William Crookes built the first one in 1873, and the physics of why it spins was argued over for decades after. It needs light, not batteries, and a flat surface where it won't get knocked over.

$25.99
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What it actually is

  • Spins in sunlight or under a desk lamp
  • Invented in 1873, still argued about
  • No batteries, no cord
Checked against Amazon

Availability
In stock
Sold by
DORAMI

What these checks mean

Stock history

In stock on 1 of 1 day we have checked since Sep 10.

If it sells out, the closest thing still in stock is The ball never reaches the bottom.

Details

BrandDORAMI
ConditionNew
CategoryWeird desk toys and fidget gadgets

Listed on Amazon as: DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass…

Full Amazon listing name

DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes

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