Radiometer "Light Mill"
With the purchase of a light mill, you acquire a high-quality product of glass art.
The light mill is an invention of the English physicist Sir William Crookes (1832-1919) around the turn of the century and is actually a measuring device for the infrared radiation of starlight.
The impeller, made of mica, is easy to turn and blackened on one side and is located in a concrete vacuum within the sphere. When exposed to light and heat, the dark surfaces heat up more than the light ones.
Due to this temperature difference, the air molecules move faster in front of the dark surface and push the impeller into a rotating movement.
The more intense the light, the faster the wheel turns.
It can thus be described as a small solar power plant. Over time, the light mill developed from a measuring device and teaching aid to decorative glass.
Glass craftsmanship in perfection!
Modern gifts traditionally produced.