Crookes Radiometer 18cm In a world where energy is scarce, we’re relying more and more on the sun for power. But how does it work.The Crookes Radiometer can show you in real time the impressive power of light. The vanes inside an airtight glass bulb rotate when exposed to light, spinning faster as light gets more intense. It’s real life thermodynamic science in action, without any of the hard work or complicated stuff – just stick it under the sun and watch it spin!
The vanes spins when in direct sunlight – the more intense the light, the faster it spins!
No power supply required
Perfect for wannabe Einstein’s
Glass outer construction
Airtight bulb with partial vacuum
Rotating spindle on axis
Lightweight metal vanes
Suitable for children under supervision
Not suitable for kids under 3