Using a home-made electroscope by holding a pen above the foil boil appearing out of the lid of the jar. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / DK IMAGES |
Taille de l’image : | 3994 px × 4961 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |