Light bulb,historical artwork. This is an incandescent light bulb,using a metal filament through which an electric current is passed. The filament is enclosed in an inert gas under a glass bulb. As the electric current passes through the filament,it heats up and emits light and heat. Various designs for this type of light bulb were developed in the 19th century,but the one that achieved success was the one invented by Thomas Edison in 1880 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Kulyk, Mehau |
Taille de l’image : | 3900 px × 4620 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |