Item #81134

Experience this sphere powered by the sun! It spins when sunlight warms the dark vanes and is reflected by the white ones.
This product is out of stock and is currently discontinued.
has been added to your cart.
An unexpected error has occurred and we are unable to process your request at this time.

It has never been more fun to learn! Engage children of all ages with STEM toys that will encourage them to explore, understand and be inspired by the world of science, technology, engineering and math. 

This radiometer is a fun, vivid way to demonstrate heat transfer!

The wings in the radiometer are alternately dark and light. When the light strikes the wings, it transfers heat to each one, but not at the same degree. The light wings reflect the rays and the dark wings absorb the rays. As the light gets brighter it creates more heat and spins the wings faster.

Size: 3.25" x 3.25" x 5.25 (.3 lbs)

Brand Name: American Educational Products

Astronomy Discover