Feature(may vary by option.)

●The stronger the light, the faster it turns. If possible, place it on a window sill or other place with strong light.
●Beautiful design suitable any decoration，For example, home, office, classroom, party...
●Made of glass and made by hand.
●It does not require batteries, only light. Suitable for people over 14 years old.

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Description

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.