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The filament does not "burn", it just glows brightly. If some air were present in the bulb - as sometimes happens if a light bulb gets knocked and gets even a tiny crack in its glass bulb - then the oxygen present in ordinary air will quickly make the filament burn away.
For more information see the answer to the Related question sghown below.
Wiki User
∙ 13y ago
Wiki User
∙ 13y agoIn a conventional incandescent light bulb, the filament does not burn partially because the bulb is filled with an inert gas that will not allow combustion (typically argon), and partially because the current is just below the level that will cause the filament to rupture. Tungsten was found to be the ideal element for this purpose. If you have ever noticed in a old lightbulb, there is a "black smear" on the bulb. That is deposited tungsten that has evaporated from the filament, and re-deposited on the inside of the bulb. That process is continuous. When enough of the tungsten has evaporated from the filament, the filament becomes too thin to support the current flowing through it, and it ruptures - a burned-out bulb.
Wiki User
∙ 8y agoAn inert gas is inserted into the bulb when it is manufactured. Without oxygen present there is no combustion.
Wiki User
∙ 12y agoit has an element that produces heat (direct short)
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Why bulb filament does not burn at high temperature?
The metal will melt if you do that.
Why is the bulb evacuated?
If they were not evacuated of all outside air, the filament will burn up in seconds because the air Will cause Resistance, thus the filament will burn brighter and brigther tyring to burn off the air until it opens. (blown bulb)...
Why would a light bulb burn out after two days of use?
If a light bulb is handled roughly before it was installed, the filament holder could have been weakened. Another reason that bulbs burn out before their time is that they are being submitted to a higher voltage than the bulb rated for.
What is the wire inside a light bulb called?
filament
What the filament of bulb is broken then it is called?
Fused bulb
Why bulb filament does not burn at high temperature?
The metal will melt if you do that.
Why it is said not to throw water at a glowing bulb?
ts filament will not burn
Why does the filament in a light bulb not burn up immediately?
The 'Filament' of a lightbulb is a peice of metal with an unusually high melting
Why is the bulb evacuated?
If they were not evacuated of all outside air, the filament will burn up in seconds because the air Will cause Resistance, thus the filament will burn brighter and brigther tyring to burn off the air until it opens. (blown bulb)...
Why the electric bulb does not works if oxidation takes place inside it?
Because the filament will burn, and the filament is the part that produces the light.
In a bulb noble gas argon is used . why is argon is used instead of air in the light bulb?
It won't burn the filament.
Is line spectrum obtained from filament of bulb?
filament of bulb
What will happen if a light bulb gets too much electricity?
If its an incandescent bulb the filament burns out; depending on the voltage put through the bulb (and the operating voltage of the bulb) the results can be quite spectacular. Normally the filament will burn out with a bright flash, if the voltage is high enough the bulb may explode.
How the bulb light?
An electrical current is passed through the high resistance filament in the bulb, causing it to become white hot and so give off light. The inside of the bulb is filled with an inert gas, such as nitrogen, so the filament does not burn up .
How bulb light?
An electrical current is passed through the high resistance filament in the bulb, causing it to become white hot and so give off light. The inside of the bulb is filled with an inert gas, such as nitrogen, so the filament does not burn up .
Why do they use argon gas in a light bulb?
It is used to replace oxygen so that the hot filament does not get oxidised or burn.
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
