The transparent radiometer, also known as the light mill, was invented in 1873 by chemist Sir William Crookes. While weighing minute quantities of samples in a partially evacuated glass chamber this celebrated British chemist observed the scales moved when exposed to sunlight. With some refinement the vanes were made to rotate using this remarkable photoelectric effect.
The radiometer itself consists of an airtight glass bubble with vanes inside which are mounted on a spindle in a partial vacuum. The vanes themselves are black on one side and polished metal on the reverse.
When you expose the radiometer to light from the sun intense artificial light, the vanes rotate. The reason for the rotation has been a cause of much scientific debate. However you will be captivated by this device, watching as it spins with varying intensity depending upon the brightness of the light that falls upon it.
Featuring in Designer's Atelier's collection of international treasures for the home this item is the paramount example of this type of device discovered for your pleasure by award-winning designer Dagmar Holub.
Material: Glass and Metal
Product Dimensions Small: H16CM X Dia8CM
Product Dimensions Large: H24CM & Dia8CM
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