An incandescent bulb uses heat caused by an electrical current. When electrical current passes through a wire, it causes the wire to heat. The wire, or filament, gets so hot that it glows and gives off light. Everyday incandescent light bulbs have a filament made of tungsten. Since the hot tungsten would quickly burn away if it were exposed to oxygen, it must be placed in a sealed glass bulb which is either evacuated or filled with a gas that won’t let it burn. THE END
In a light bulb there is a filament between the two pieces that are like electricity posts. As the current passes through the filament it glows to prodce light.
An electrical current passes through a thin filament, heating it and causing it to become excited, releasing thermally equilibrated photons in the process which produce light.
In a light bulb a filament usually made out of tungsten is between two electrical posts. As the post cuduct electricity the tungsten heats producing light. That is how lightbulbs work.
5 comments:
An incandescent bulb uses heat caused by an electrical current. When electrical current passes through a wire, it causes the wire to heat. The wire, or filament, gets so hot that it glows and gives off light. Everyday incandescent light bulbs have a filament made of tungsten. Since the hot tungsten would quickly burn away if it were exposed to oxygen, it must be placed in a sealed glass bulb which is either evacuated or filled with a gas that won’t let it burn. THE END
In a light bulb there is a filament between the two pieces that are like electricity posts. As the current passes through the filament it glows to prodce light.
An electrical current passes through a thin filament, heating it and causing it to become excited, releasing thermally equilibrated photons in the process which produce light.
In a light bulb a filament usually made out of tungsten is between two electrical posts. As the post cuduct electricity the tungsten heats producing light. That is how lightbulbs work.
A light bulb is used to give off light. A current passes through a filament and therefore there is light.
Post a Comment