Hand of an eight year old girl, 1896.

 
Hand of an eight year old girl, 1896.
4 0 c m
 
26cm
actual image size: 18cm x 32cm

Description

Photogravure taken from the original X-ray. In 1895, as Profesor of Physics at the University of Wurzburg, Wilhelm Conrad Roentgen (1845-1923) was experimenting with a Crookes' radiometer (cathode ray tubes), invented in 1875. He noticed that when cathode rays struck the end of a discharge tube, rays of a new kind were emitted, capable of penetrating matter. On 22 December 1895 he took the first X-ray, an image of the ringed hand of his wife Bertha. He was awarded the first Nobel Prize for physics in 1901.

© National Museum of Science & Media / Science & Society Picture Library

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