the state of gases in a flourosent tube
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A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.
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it is filled with gases containing low pressure mercury vapour and Nobel gases at a total pressure of 0.3% of atmospheric pressure...
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