Solar Crookes Radiometer Glass Windmill Handmade for Party Home Decoration Gift Blue S

The radiometer is educational and physical demonstration object that was invented by English physicist Crooks about 100 years ago. Today the Radiometer has become a home decoration or holiday gift.Of course, it can also be a physics teaching tool. The radiometer consists of a glass bulb with a partial vacuum.Inside are four vases which are mounted on a spindle.The vanes rotate when exposed to sunlight,artificial light or infrared radiation.

• The stronger the light, the faster it turns. If possible, place it on a window sill or other place with strong light.Under the sunshine, the windmill keeps spinning, which can make people daydream endlessly and relax.
• Beautiful design suitable any decoration，For example, home, office, classroom, party...
• It is made of glass and by hand, and each product is a work of art. It would be a good idea to give it as a gift.
• It can also serve as a teaching tool to demonstrate the principles of converting light energy into kinetic energy in physics.
• It does not require batteries, only light. Suitable for people over 15 years old.