The radiometer also as known as lightmill is an educational and physical object to demonstrate, how powerfull the sunlight is. It was developed by the English physicist Sir William Crookes (1832-1919) in the year 1873. This physical and technical miracle shows you how sunlight is changed into kinetic energy. The sun is the energy source of the future! The solar radiometer became a technical interesting and entertaining object for the modern living room and shows you, when it stands next to the window, every shaft of sunlight because the wings start to move. All lightmills are NEW and got a diameter about 2.36, 3.15, 4.33 inch approx 110 mm / 80 mm / 60 mm with a perfectly matching drop as the border of the chain.
S**Y
well constructed. great for the office.
this is great. works very well and a nice piece of art. Hand painting is done well. Must handle as you would a delicate Christmas ornament. Not for children. You should not hang in a window that opens. Wind is not a friend to this artwork.
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