Radioactive light signs

Numéro d’image : 11905519
Radioactive light signs
Radioactive light signs. 1 of 2. These historical signs have self-powered lighting,where they emit light without requiring an external power source. They work by using a radioactive source that undergoes beta decay. Beta decay is a process where unstable isotopes (atoms that vary in their neutron number) transform into more stable isotopes. During this process,they release energy in the form of beta particles. The emitted beta particles are used as the energy source for these signs. The two main sources of beta lighting were radium and tritium. See V900/143 for an image of these signs in the dark
Licence : Droits gérés
Crédit: Science Photo Library / Public Health England
Taille de l’image : 5038 px × 3543 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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