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Electrical Apparatus Working Geissler tube, c 1988

Electrical Apparatus Working Geissler tube, c 1988
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Largest available format 2729 × 3504 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 2729 × 3504 px 231 × 297 mm 649 KB
Medium 798 × 1024 px 68 × 87 mm 617 KB

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IMAGE number
UIS5082535
Image title
Electrical Apparatus Working Geissler tube, c 1988
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Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

Electrical Apparatus Working Geissler tube, c 1988. The German glass blower Hermann Geissler (1814-1879) produced the first permanently sealed discharge tubes to show that when an electric current passes through a gas at low pressure the gas glows. These were the fore-runners of the Geissler tubes used in science demonstrations. Two metal electrodes pass through the glass, and are connected to a very high voltage to make the gas in it glow. The colour produced is characteristic of the gas. The tubes may have two or more chambers containing different gases to produce different colours. ©SSPL/Science Museum

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SSPL/UIG / Bridgeman Images
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