Ultraviolet (UV) cleaning. Platinum-iridium kilogram mass prototypes being cleaned with UV light and ozone. First,UV light at a wavelength of 185 nanometres creates ozone,which bonds with hydrocarbon contamination on the metal surface. A second UV wavelength at 250 nanometres then breaks these bonds,releasing the contamination in the form of carbon dioxide. Photographed at the National Physical Laboratory,Teddington,UK | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Brookes, Andrew / National Physical Laboratory |
Taille de l’image : | 4852 px × 3639 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |