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A light bulb needs a vacuum to prevent the combustion (burning) of the filament when it's heated. The vacuum assures that there is no oxygen in the bulb, which would be necessary to support combustion.
Wiki User
∙ 10y ago
Wiki User
∙ 12y agoThe filament is kept in a vacuum because it is made of steel wool. When electricity runs through steel wool, it lights up. However, if any oxygen is present, it will catch fire.
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What stops the filament in a light bulb from Catching Fire?
For the filament tocatch fire you need to have oxygen present so depending on the type of light bulb it may be a vacuum inside or have some sort of inert gas inside that is not oxygen.
Why is the filament of a light bulb surrounded by glass?
Because inside of the glass bulb lies a vacuum that prevents the bulb from burning out within a few seconds rather than several thousand hours.
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
What type of light is a light bulb that uses a filament?
A light bulb that uses a filament is also known as an incandescent light bulb.
Which has the thickest filament - a high-resistance or a low-resistance bulb?
A low resistance bulb has a thicker filament.
What will be in between the filament and glass of a bulb?
Inert gas or vacuum.
What is isnside a light bulb?
There are several types of light bulb. A basic incandescent bulb will contain a tungsten filament, surrounded by a vacuum. Variations may have an inert gas inside the bulb, such as halogen.
Is line spectrum obtained from filament of bulb?
filament of bulb
What stops the filament in a light bulb from Catching Fire?
For the filament tocatch fire you need to have oxygen present so depending on the type of light bulb it may be a vacuum inside or have some sort of inert gas inside that is not oxygen.
How is resistance used to create light in a tungsten light bulb?
Electricity creates heat when flowing through a resistor such as the filament in a tungsten light bulb, and, since the heat can not be readily conducted away in the near vacuum inside a light bulb, the heat eventually raises the temperature of the filament to a value that leads to radiation of light from the hot filament.
Why is the filament of a light bulb surrounded by glass?
Because inside of the glass bulb lies a vacuum that prevents the bulb from burning out within a few seconds rather than several thousand hours.
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
Who was the first one that made the light bulb?
thomas Edison invented the first light bulb he used a filament from a vacuum cleaner he tried thousands of dofferent filaments the vacuum cleaner filament was the best one it lasted a few hours on the other hand all the other ones lasted like ten seconds
What do you use to make a light bulb?
Glass and metal. More specifically, a filament, wires that conduct, and a vacuum inside a glass shell.
What do use to light a light bulb?
Glass and metal. More specifically, a filament, wires that conduct, and a vacuum inside a glass shell.
What is filament in a bulb?
The filament is the small coil that glows when the bulb is on. I believe its made out of tungsten
How a lamp lights with the use of electricity?
a light bulb as the ones used in lamps. lights by fine filament inside the sealed vacuum bulb. one side of the filament connects to the bottom raised portion. the other end of filament connects to the silver screw in part. when the light bulb is screwed all the way down, the bottom of the bulb hits the slightly raised flap at the bottom of the socket. pos.+. and the side of socket is in contact with the side of bulb. Neg.-.put on switch and and electricity flows through the filament, you have light.
