Luminous Electrical Discharges, 1898

Numéro d’image : 12631489
Luminous Electrical Discharges, 1898
Luminous electrical discharges of high tension alternating currents in air and in Geissler's tubes. A Geissler tube is an early gas discharge tube used to demonstrate the principles of electrical glow discharge. The tube was invented by the German physicist and glassblower Heinrich Geissler in 1857. It consists of a sealed, partially evacuated glass cylinder of various shapes with a metal electrode at each end, containing rarefied gasses such as neon, argon, or air; mercury vapour or other conductive fluids; or ionizable minerals or metals, such as sodium. When a high voltage is applied between the electrodes, an electrical current flows through the tube. The current dissociates electrons from the gas molecules, creating ions, and when the electrons recombine with the ions, the gas emits light by fluorescence. The colour of light emitted is characteristic of the material within the tube, and many different colours and lighting effects can be
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Taille de l’image : 4500 px × 2844 px
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