水杯 - 酒杯 - 擺式玻璃-空氣扭轉
編號 33609729
原始克魯克斯輻射計第一系列,1900年初, (1) - 玻璃, 輕金屬 - 20世紀初
編號 33609729
原始克魯克斯輻射計第一系列,1900年初, (1) - 玻璃, 輕金屬 - 20世紀初
Original Crookes radiometer, first series, 1900.
The Crookes radiometer (also known as a light mill) consists of an airtight glass bulb containing a partial vacuum, with a set of vanes which are mounted on a spindle inside.
The vanes, built with light metal, rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.
It was invented in 1873 by the chemist Sir William Crookes as the by-product of some chemical research.
The radiometer on auction, unlike some imitations with a slight bump on top, has a perfectly rounded glass bulb.
Dimensions: 140x80x80 mm
PRO insured shipping with proper material (sturdy hard box, 1 cm polystyrene layer on all sides of the box, protective film and 200 g bubble wrap to protect your parcel from shocks and falls).
The item of this auction will be shipped via DHL/NEXIVE.