Solar Radiometer

GET INSPIRED BY THE NATURE POWER OF THE SUN !!

This SOLAR RADIOMETER illustrates radiant energy of heat and light around you.

In 1873, while investigating infrared radiation and the element thallium, the eminent Victorian experimenter Sir William Crookes developed a special kind of invention.

The radiometer is made from a glass bulb from which much of the air has been removed to form a partial vacuum. Inside the bulb, on a low friction spindle, is a rotor with several vertical lightweight metal vanes spaced equally around the axis. The vanes are polished or white on one side and black on the other. When exposed to sunlight, artificial light, or infrared radiation (even the heat of a hand nearby can be enough), the vanes turn with no apparent motive power, the dark sides retreating from the radiation source and the light sides advancing. Just place near a window or under a direct incandescent light as the vanes only rotates in any light. The more light shine on the globe the faster the vanes rotates.

Features:
● Magnificent Glass Radiometer gets you closer to the power of the most vital and mysterious energy source, Light.
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● This physical and technical miracle shows you in a clear way how sunlight is converted to energy.
● Place near a window or under incandescent light and watch as the vanes rotate.
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Specification:
Material: Glass
Color: Clear
Size: 14cm*7.5cm (Globe is 3.5 inch in diameter and stands 8 inch tall)

Package Included:
1 x Solar Radiometer