Description:
【Automatic rotating】:The glass Radiometer will rotate automatically under the sunlight or strong irradiation.
【Table decoration】:Rotating Vanes Desk Toy can be used for decoration in offices, living rooms, bedrooms, classrooms, study rooms, parties, etc.
【Educational】: Glass Windmill with an internal vacuum. It can rotate by itself through light, and can also rotate in the opposite direction through cold wind.
【Principle】: When the light black fan absorbs heat energy, white fan releases heat energy, it can promote the four fans rotation.
【Material】:Solar Power Crookes is made of glass, great for Physics teaching tool.
Size Chart:
Diameter of ball:7.5cm/2.95inch
Diameter:6.5cm/2.56inch
Height:13.8cm/5.43inch
Package Includes:
1 Solar Power Crookes
Note:
Please allow slightly errors 1-2cm differences due to manual measurement.