Sun Toy Gadget Toys Educational Power Energy Robot Kit For Kids Toys

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Solar Rotating Windmill Desktop Decoration Glass Ornaments Sun Toy Gadget Toys Educational Power Energy Robot Kit For Kids Toys

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Also known as the light mill or solar engine,the solar radiometer demonstrates with simple physics and movement how light can be transformed into energy.Its invention in 1873 is credited to Sir William Crookes,an English physicist.The black and polished vanes are suspended in the semi-vacuum created inside the radiometer.When exposed to a warm light source,such as the sun to a tablelamp,the vanes spin.The more powerful the light source the faster the vane absorbs light faster than the polished side.Aire pressure builds and raises the temperature of the air molecules on the black side of the vane causing the spinning motion.

Product note:

1.Radiometer are hand made and will vary slightly in size and color.The black used on the vanes can flake off sometimes.These flakes are usually very samll.This is not a defect,but just a result of the hand made nature of this product.

2.Your radiometer will not work with fluorescent light.In order to make it function properly,you can expose the radiometer to intense light or natural sunlight.

3.Most importantly,enjoy your radiometer.

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