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How does a light bulb work? Part 3
How does a Light Bulb Work?
By Emma Z. 2011
incandescent light is one of the many types of light
Incandescent Light bulb
It has a thin, curly wire call
ed a filament.
ectricity flows through the wire it h
eats up and gives off light
The glass part of the light is called the bulb. It keeps the air away so the filament won’t burn out for a w
light or energy saving light
A fluorescent light uses
Fluorescent Light bulb
70% less energy than an incandescent light.
It can last for up to 10 years.
fills up with electricity.
The electrodes produce a stable flow of electrons inside the pipes.
The electrodes go and cooperate with the mercury gas, giving off a UV light.
Visible light comes when the UV light passes through the phosphor outer covering.
Electrical Discharge Light
In an electric discharge light, the light glows when a current motivates the gas until it finally gives of a white heat.
Visible light is created when excited atoms calm down and go to their normal, unexcited self.
Visible light’s speed was first calculated in 1676 by the astronomer Olaus Roemer. He was Danish.
Visible Light Spectrum
Ultra Violet Light
Ultra – Violet light
Ultra-violet light is another type of light. Long contact with this light can give you a suntan
They first realized the effect of the UV light in 1801.
They just recently discovered what the effect of UV light has done on living things.
You can get vitamin D from the sun, which is UV light.
You can also get skin cancer from too much of short – wavelength UV radiation.
a silvery metal that is a liquid
metal compounds or earth compounds of various types
– a conductor that electricity enters or leaves an object
– something that allows electricity to pass through
a particle with negative energy that is in all atoms
Diagram of the incandescent light
Diagram of how the flourescent light works
Woodford, Chris. Cool stuff and how it works. London: DK, 2005. Print.
Electricity and Magnetism: Current Electricity. Prod. Colgren Communications. Colgren Communications, 2004. Discovery Education. Web. 22 September 2011. <
"radiation." Compton's by Britannica. Encyclopedia Britannica Online School Edition.
Encyclopedia Britannica, Inc., 2011. Web. 22 Sept. 2011.
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