Halogen light bulb. This incandescent bulb contains a tungsten filament enclosed in a small quartz envelope inside the bulb. The quartz envelope contains the vapour of a halogen,such as iodine or bromine,which allows the filament to operate at a much higher temperature than in a conventional tungsten bulb. This results in greater brightness and a longer life than standard incandescent bulbs | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Terry, Sheila |
Taille de l’image : | 2912 px × 4368 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |