why the electric bulb is filled with chemically uneactive gas like Argon or nitrogen??
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hey bcoz it both retards the evaporation of the tungsten filament compared to operating it in a vacuum..... This allows for greater temperatures and therefore greater efficacy with less reduction in filament life....
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hope this helps !
bghosh369:
Electric bulbs are filled with chemically inert nitrogen and argon gases so that the filament of the bulb is thermally isolated which prolongs the life of the bulb and prevents it from getting oxidized even at High temperatures
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The closed glass chamber of the bulb contains, an inactive (inert) gas, Argon. The glass chamber can’t be filled with air as the presence of oxygen will cause the filament to burn, i.e. react with oxygen. The glass chamber can’t be made vacuum. As in vacuum condition, the filament will evaporate because of very high temperature, making the bulb unusable. The only solution to these problems is an inert gas. The inert gas within the bulb will maintain a particular pressure, preventing the filament from evaporating. An obviously, inert gas won’t react with the filament. Nitrogen is also used like argon .
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