What is Gas-filled tube?
[[File:Edelgase in Entladungsroehren.jpg|thumb|[[Noble gas]]es in discharge tubes; left to right: [[Helium]],[[Neon]], [[Argon]], [[Krypton]] and [[Xenon]]]] A '''discharge tube''', or a '''gas-filled tube''' is an arrangement of [[electrode]]s in an insulated container, containing a [[gas]]. Very often, [[glass]] or [[ceramics]] are used as insulation. When there is enough charge on these electrodes, there will be an [[Electric discharge in gases|electric discharge]], which will produce [[light]]. In the 19th century, [[Heinrich Geißler]] developed the [[Geissler tube]],and [[Philipp Lenard]] did experiments that led to the development of the [[vacuum pump]]. Both technologies were used to develop the discharge tube. The most common kind of discharge tube is the [[gas discharge lamp]]. {{Electronic components}} {{sci-stub}} [[Category:Technology]]