Halogen lamp filament, SEM

Halogen lamp filament, SEM

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Credit: EYE OF SCIENCE/SCIENCE PHOTO LIBRARY

Caption: Halogen lamp filament. Coloured scanning electron micrograph (SEM) of a tungsten filament from a halogen bulb. This filament of this incandescent bulb is enclosed in a small quartz envelope inside the bulb. The quartz envelope contains the vapour of a halogen gas, 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. Magnification: x1600, when printed 10cm wide.

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Keywords: bulb, chemical, chemistry, coiled, colored, coloured, device, equipment, everyday object, false-colored, false-coloured, familiar item, filament, halogen, halogen gas, incandescent, light bulb, metal, microscope, no-one, nobody, physical, physics, scanning electron micrograph, sem, technological, technology, tungsten

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