The vanes, or wings, affixed to the center pole of this solar radiometer are alternately dark and light in color. When the light strikes these wings it transfers heat to each one - but not to the same degree. The lighter wings reflects the sun's rays and the darker wings absorbs. The stronger the light, the more energy present to heat up the darker side of the wing causing the wings to spin faster. The scientific property that this elegant glass device demonstrates is heat transfer. The wings of the radiometer spin under natural solar light or a regular light bulb. Perfect for science projects, as a gift or as a desk amusement!
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Learn all about the science of light, optics and visual perception with this wonderful kit!