View of an lit electric light bulb
Numéro d’image : 11892305
| Light bulb. View of a lit electric light bulb. Bulbs produce light from a filament (upper centre),a fine coiled wire of tungsten which heats up and glows as an electric current is passed through it. Tungsten is an ideal material for a filament as it is strong and has a high melting point (3410 degrees Celsius). The interior of the bulb contains an inert gas,usually a mixture of nitrogen and argon. Air cannot be used as the oxygen it contains would corrode the tungsten. Whilst in use,the tungsten filament gradually evaporates away until eventually it breaks | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Tek Image |
| Taille de l’image : | 3693 px × 4809 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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