Crookes radiometer, 1877.

ScM Photo Studio

 
Crookes radiometer, 1877.
4 0 c m
 
33cm
actual image size: 25cm x 32cm

Description

William Crookes (1832-1919) devised the radiometer in 1875 while investigating the behaviour of hot bodies in a vacuum. This example was made in Crookes' laboratory in 1877. The pivoted vanes, each blackened on one face, rotate inside the nearly evacuated globe when it is placed in sunlight. Crookes made many important contributions to science. His hope that the radiometer would be used to measure heat radiation was not fulfilled, but it remains a fascinating scientific toy. How it works was not explained fully for many years.

Image Details

Artist
 
Image Ref.
 
10307315

© Science Museum / Science & Society Picture Library

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