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Electrostatic Equipment Crooke's radiometer, c 1875

IMAGE number
UIS5069443
Image title
Electrostatic Equipment Crooke's radiometer, c 1875
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Location
Science Museum, London, UK
Medium
object
Image description

Electrostatic Equipment Crooke's radiometer, c 1875. William Crooke Crooke's radiometer, c 1875. William Crooke (1832-1919) devised the radiometer to measure the amount of pressure produced by light particles. In the radiometer light works by turning a set of finely balanced vanes. The glass bulb contains air at reduced pressure, and heated molecules of air bounce off the vanes and push them around. If the air is removed the vanes stop, as light pressure alone cannot push them around. ©SSPL/Science Museum

Photo credit
SSPL/UIG / Bridgeman Images
Image keywords
19th century / Science / material / glass / thing / accessory / photography / tool / measure / Weights And Measures

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Largest available format 2593 × 3248 px 1 MB
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Large 2593 × 3248 px 220 × 275 mm 562 KB
Medium 818 × 1024 px 69 × 87 mm 621 KB

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