Gas Discharge Sources Xenon Gas Discharge Tubes The most common form of this class of light source is the electronic camera flash.These devices are some of the most intense light sources available to the experimenter and have many interesting applications. The discharge lamps are typically made from a glass tube with ametal electrode installed at each end. They are filled with xenon gas at about one atmosphere of pressure (14psi). The gas inside the tube can be made to glow with very high intensity when an electricalcurrent is passed through it.
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