Page Navigation - Go to: site index | start of page content | icon category menu | links to related material | links to more icons
MAKING THE MODERN WORLD
Stories about the lives we've made

Icon:Crookes' radiometer, 1877

related ingenious images © Science Museum/Science and Society Picture Library

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.

Inv. 1919-382
GO BACK TO SCIENCE GO BACK TO SCIENCE
Scene  Rich Media