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Oxygen in the bulb would cause the hot metal elements to oxidized and burn out. Mr. Edison had a large problem with this until he removed the air from his bulb. Most incandescent bulbs today do not have a vacuum but instead are filled with an inert gas.
MORE DETAILS:
Modern light bulbs don't 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 conducting heat directly from the glowing filament to the whole inner surface area of the glass bulb. The heat then passes through the glass and the whole outer surface area of the glass bulb then conducts and radiates 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 hole or 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 away and conducts the heat produced by the filament away to the outside air via the glass bulb.
What else can I help you with?
Which came first the telephone or the electric light bulb?
The electric light bulb came first but was patented later that the telephone was.
Is a light bulb evacuated?
Yes, the inside of a light bulb is a partial vacuum.
What was the first light bulb made up of?
The first practical light bulb was made up of a filament made of carbonized bamboo that was placed inside a vacuum-sealed glass bulb. This filament would emit light when an electric current passed through it.
What is a electric bulb in short?
a bulb is light bulb
How is invented the electric bulb?
Thomas Edison is credited with inventing the incandescent light bulb in 1879. He developed a practical and commercially viable light bulb by creating a long-lasting carbon filament inside a vacuum-sealed glass bulb that could produce light when an electric current passed through it. Edison's invention revolutionized the way we illuminate our homes and businesses.
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.
What did the first light bulb look like?
The first light bulb was invented by Thomas Edison in 1879. It had a carbonized bamboo filament inside a glass vacuum bulb. When an electric current passed through the filament, it would glow and produce light.
When was Edison's first success in his light bulb?
The first electric light was made in 1809 by Humphry Davy, an English scientist. He experimented with electricity and when he connected wires and a piece of carbon to a battery, the carbon glowed, producing light. In 1875 Herman Sprengel invented the mercury vacuum pump making it possible to develop a practical electric light bulb by making a really good vacuum inside the bulb possible. In 1878 Sir Joseph Wilson Swan, an English physicist, was the first person to invent a practical and longer-lasting electric light bulb (13.5 hours). Swan used a carbon fiber filament derived from cotton. Many others contributed to the development of the light bulb during the years. It Is clear that Tomas Alva Edison could not be credited with the invention of the electric light bulb.
What gases are in a light bulb?
Light bulb is filled with inert gas or simply a vacuum.
What is the Function of light bulb in an electric circuit?
The function of a light bulb in an electric circuit is that it turns electrical energy into light.
When was the first electric light bulb used?
where was the first light bulb used
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.
