Radium alpha particles. Coloured image of the radioactive emission of alpha particles from radium. A speck of radium salt was placed on a special emulsion on a photographic plate; when developed,the emulsion reveals the yellow tracks of alpha particles emitted by the radium. Radium is the most powerful radioactive substance known; it emits radiation a million times more intensely than uranium. It was discovered by the French scientists Marie and Pierre Curie in 1898 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Powell, Fowler & Perkins |
Taille de l’image : | 1801 px × 2240 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |