Coloured X-ray of assorted electric light bulbs

Bildnummer 11892315
Coloured X-ray of assorted electric light bulbs
Light bulbs. Coloured X-ray of an assortment of electric light bulbs. Some have screw fittings and some bayonet fittings. Each has a finely coiled filament inside a glass envelope. A fine tungsten wire (about 0.01mm thick) is wound into a helical coil,and then wound into a larger diameter helical coil. Tungsten is ideal for a filament as it is strong and has a high melting point (3410 degrees Celsius). The glass bulb is filled with an inert nitrogen/argon mixture to prevent oxidation. As the bulb runs,however,small amounts of tungsten deposit onto the glass. Eventually,this results in the filament breaking; a domestic light bulb lasts about 1,000 hours
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library / Gustoimages
Bildgröße: 3500 px × 3000 px
Modell-Rechte: nicht erforderlich
Eigentums-Rechte: nicht erforderlich
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