Skip to product information
1 of 3

IS Gift


Regular price $24.95 AUD
Regular price Sale price $24.95 AUD
Sale Sold out
Tax included. Shipping calculated at checkout.



In a world where energy is scarce we’re relying more and more on the sun for power. The Crookes Radiometer can show you in real time the impressive power of light

How does it work?

Inside the Crookes Radiometer is a rotor with 4 metal vanes. The vanes are silver on one side and black on the other.

When exposed to light or heat the black side of the vane heats up faster than the silver side causing a small current of air that turns the vanes! The vanes spin faster as light gets more intense. It's thermodynamics in action and fascinating to watch!


  • Solar powered science!
  • The vanes spins when in direct sunlight
  • The more intense the light, the faster it spins!
  • No power supply required
  • Perfect for wannabe Einsteins


  • Material: Glass / Metal
  • Age: Suitable for children under supervision. Not suitable for kids under 3