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english: the crookes radiometer, also known as the light mill or solar engine, consists of an airtight glass bulb, containing a partial vacuum. inside are a set of vanes which are mounted on a spindle. the vanes rotate when exposed to light. the reason for the rotation has
dec 04, 2018 light energy differentially warms the vanes flat surfaces, imparting energy to the gas molecules which kick the vanes into a rapid rotation. radiometers may also be described as solar radiometers or UV radiometers. the radiometer comes with instruction and explanation sheet.
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It is sometimes called a light mill. crookes radiometer appears to be a cross between a scientific invention and a childs toy. the atmosphere inside the bulb is a modest rather than a complete vacuum, so resistance to vane rotation is minimal. It rotates as if the sun somehow pushes the black surfaces. crookes radiometer why a big deal?
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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. when exposed to a warm light source, such as the sun or a lamp, the vanes spin. the more powerful the light source the faster the vanes will spin
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