Portrait of Sir William Crookes,1832-1919
Numéro d’image : 11827718
| Portrait of English physicist Sir William Crookes (1832-1919),discoverer of the element Thallium. Crookes is probably best known for his invention of the radiometer,a device consisting of a set of pivoted vanes in a vacuum. One side of each vane is blackened,the other shiny,& in the presence of sunlight the vanes turn steadily. Although never more than a toy,Crookes' radiometer did provide evidence for the kinetic theory of gases. Crookes developed methods for producing better vacuums & studied cathode rays,showing that they were deflected by a magnet. He was the first to realise that they were beams of charged particles. Crookes also did important work on radioactivity | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library |
| Taille de l’image : | 2549 px × 3912 px |
| Model Release : | Le droit n'est pas encore disponible. Merci de nous contacter avant utilisation. |
| Property Release : | Non requis |
| Restrictions : | - |
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