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It is something that takes out the oxygen so it can last longer.
A vacuum is a negative pressure, meaning there is no oxygen in there. Most modern bulbs don't use a vacuum. They simply pump in an inert gas that won't contribute to burning, and that chases the oxygen out.
Wiki User
∙ 6y ago
Wiki User
∙ 6y agoSo the filament lasts longer. Because oxygen in the bulb would cause the hot metal elements to oxidize and burn out.
However, modern light bulbs don't actually hold a vacuum. Instead they are filled with an inert (electrically non-conducting) gas such as Nitrogen. An inert gas is used to fill the bulb (instead of just pumping out almost all the ordinary air to leave a near-vacuum) because the action of filling the bulb with an inert gas flushes away ALL of the ordinary air. In addition the inert gas has the very useful physical property of helping to conduct heat from the glowing filament to the glass bulb. This allows the whole surface area of the glass bulb to radiate heat into the surrounding air. It is important to understand that the inert gas does not allow the filament to "burn away" as it would if some air were still present in the bulb. This sometimes happens if a light bulb gets knocked and gets even a tiny crack in its glass bulb: the oxygen present in ordinary air will quickly make the filament burn away. So, to summarize, the inert gas which is used to fill the glass bulb allows the filament to glow very brightly without burning and conducts the heat produced by the filament away to the glass bulb.
Wiki User
∙ 7y agoGlass is an insulator used in a light bulb.
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Which light bulbs are coated on the inside with a powder?
fluorescent
What are some advantages of using GU10 light bulbs?
Some advantages of using GU10 light bulbs are the fact that you could avoid the disadvantages of using regular light bulbs. GU10 light bulbs don't have poisonous gas inside of the bulb.
Why do the flimant in light bulbs not have oxygen inside?
because it doesn't let the light glow
Why does an electric bulb bang when it is broken?
Light bulbs have most of the air removed, that is there is a partial vacuum inside the bulb. So, when they break atmospheric pressure pushes the on the glass where it is weakened and air rushes somewhat violently into the bulb.
Are light bulbs fragile?
why light bulbs are fragile
What are energy efficient light bulbs made of?
A: There circuitry inside to boost the voltage to 300 500 volts and a triac to conduct the current but the bulbs as opposed to vacuum there is gas inside those coils.
How do you produce light bulbs in CO2?
You do not. CO2 has nothing to do with the creation of a light bulb. A typical incandescent bulb has a vacuum inside. No light bulb uses CO2.
How do they stop combustion occurring in light bulbs?
"They" do that by creating a vacuum inside the bulb (i.e., there's no oxygen in the bulb to burn).
What would happen inside a light bulb if it was filled with air?
It would no longer work. Light bulbs are usually under vacuum and if air gets in the filament blows.
What is the filoment?
Its the wire inside of light bulbs.
What are the benefits of vacuum tubes and light bulbs?
They enable us to do things at night.
Which gas does not react at all it is use in light bulbs so that the metal in the light bulb can get very hot without burning?
Modern light bulbs contain no gases whatsoever; a vacuum.
Which light bulbs are coated on the inside with a powder?
fluorescent
What gas is inside light bulbs?
Argon and/or nitrogen.
What are causes for water inside of light bulbs?
condensation.
What gas is used inside a light bulb?
An inert noble gas is used inside light bulbs.
How is the early light bulb changed by the modern light bulb?
The early light bulb used a rather powerful electric current, Did not have a very good vacuum inside it and in some did not use a bulb at all! Today's light bulbs use less electricity and have no oxygen inside them. This makes them more efficient and reliable.
