Light bulb filament. Electric current passing through the tungsten filament (upper centre) has caused it to heat up and emit light | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Knapton, Chris |
Taille de l’image : | 3206 px × 4423 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |