The light bulb then needs replacing. It is necessary to be careful in replacing the light bulb. First, the switch for the light fixture needs to be turned off or the cable disconnected. This is because electricity flowing into the socket where the metallic part of the bulb sits can give you a severe electric shock if you touch the inside of the socket or the metal base of the bulb while it is still partly in the socket.
In addition, if the glass breaks it is possible to get cuts. These hazards can be reduced by ensuring the bulb is cool to the touch before grasping it and by holding it firmly but not squeezing by the fattest part of the glass while rotating counter-clockwise until it comes completely loose. Although we say the filament "burns out" it actually vaporizes over time.
Some of it can be seen as darkening on the glass where it has solidified. The gas inside the glass envelope is argon, which is used because it is inert and therefore cannot unite with the filament. The brightness of the filament can be varied by changing the amount of current flowing through it the amperage , or the voltage between ends, as the amperage is related to the voltage by Ohm's law.
Also, as the filament ages, its brightness will diminish somewhat and its light will get redder and redder. Eventually, all filaments will slowly vaporize and fail due to the high temperature caused by the electricity flowing through it.
By design, a light bulb has no oxygen in it. The manufacturer fills it with an inert gas like argon or nitrogen. However, this does not prevent atoms from popping off the surface of the filament due to the intense heat. This makes the filament thinner and thinner. Eventually, it becomes so thin that it breaks. For a short period of time, the two broken ends are very close to each other, and electricity can jump across in a bright blue spark.
However, the two broken ends soon fall away from each other, breaking the spark, and the bulb will light no more. It has changed the world by letting people do work at night. Previously this was very hard to do because other light sources such as candles or fires did not provide enough light. Travel: Night travel by automobiles has largely been made possible by the light bulb. Also, lighthouses all over the world use very powerful light bulbs, and this provides the right guidance for all ships.
Medicine: All internal and non-intrusive medical procedures use variants of the original light bulb. Mining: Earlier, underground miners used torches, which also added to the carbon dioxide content in the air, and therefore made breathing difficult.
With the advent of light bulbs, mining has also become healthier and safer. In coal mines, the risk of explosion of the coal dust contained in the air was so high that conventional fire lanterns couldn't be used they used a tepid metal mesh covered lanterns , with light bulbs coal mining became much safer. War: The development of the light bulb allowed searchlights to be built which could find enemy aircraft, eliminating the risk of being bombed by surprise.
Apart from this, the light bulb is used in various other fields including communications, sports, etc. Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. Household Appliances. Cite This! Print Citation. Try Our Sudoku Puzzles! As long as the chemical reaction in the battery continues and the circuit remains closed, there will be a current.
After all of the chemicals in the battery have undergone the chemical reaction, the battery is dead and the current stops. The glass part of the light bulb is a casing for a thin wire called a filament. Most of the air is removed from the bulb and replaced with an oxygen-free gas inert to prevent the filament from oxidizing burning up when it gets hot and glows. Likewise, how does a light bulb work diagram? An incandescent bulb typically consists of a glass enclosure containing a tungsten filament.
An electric current passes through the filament, heating it to a temperature that produces light. Diagram showing the major parts of a modern incandescent light bulb. A battery provides the energy of motion needed to make a light bulb glow. The glass part of the light bulb is a casing for a thin wire called a filament. Most of the air is removed from the bulb and replaced with an oxygen-free gas inert to prevent the filament from oxidizing burning up when it gets hot and glows.
The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten. Whenever n electric current goes through the filament, the filament glows. It may also be known as the electron emitting element in a vacuum tube. The incandescent light bulb turns electricity into light by sending the electric current through a thin wire called a filament. Electrical filaments are made up mostly of tungsten metal.
The resistance of the filament heats the bulb up. Eventually the filament gets so hot that it glows , producing light. Is Thomas Edison's first light bulb still burning? Livermore, California, is home to what residents say is the world's longest-burning light bulb. Thomas Edison, the inventor of the incandescent light bulb, would be proud.
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