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The Invention of Light Bulb

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Vicky Huang

on 30 March 2014

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Transcript of The Invention of Light Bulb

History: Inventor and Origin
The first electric light was made in 1800 by
Humphry Davy
Much later, in 1860,
Joseph Wilson Swan
, devise a practical, long-lasting electric light, and he found carbon paper filament worked well, but burned up quickly.
Thomas Edison
was the first scientist successfully invented lightbulb in 1879
Edison experimented with thousands of different filaments to find just the right materials to glow well and be long-lasting.
Edison discovered that a carbon filament in an oxygen-free bulb that blows and did not burn up for 40 hours.

Causes and Effects (impact)
Causes of the invention of the light bulb included the inability to move in darkness. That although the problem can be solved by lighting a candle, it may cause a fire
Candles are very inconvenient, you need to light them again and add oil to keep it going
Candles are also not the best source of light, because it is actually very tiring to read under candle light and hurts your eyes
Current Use and Purpose
To create brightness when sun is not shining.
People can stay up longer and thus have more time available for working.
More efficient than using torches, oil lamps, or matches.
Now lights can also be used as decoration to improve the quality of the atmosphere in a certain place.
The incandescent light bulb, which was first created, is now gradually replaced by other kinds of light bulbs, such as fluorescent lamp, compact fluorescent lamp, and LED light bulb.
People use other light sources now because of the more stability, electric efficiency, and less harm to the earth.
Incandescent bulbs are still in wide use due to their light color which is almost identical to the sun spectrum.

Works Cited
What is a Light Bulb?
Light bulb is mostly referred to Incandescent Light Bulb, which is an electric light which produces light with a filament wire.
The filament is heated to a very high temperature by the electric current passing through the wire, until it glows.
The hot filament is protected from oxidation with a glass or quartz bulb that is filled with inert gas or evacuated.
Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts.
It has very low manufacturing costs
The Invention of Light Bulb
By Anson, Joseph, and Vicky
Causes and Effects (impact)
Because of the incandescent light bulb, you can light up your room in a much safer way than using candles
You don’t need to replace light bulbs and refuel them that much, since it runs on electricity
With light, you can do almost anything in the dark easily, you can travel and continue working, so that people are not so dependent on sunlight
Light bulbs simply illuminate the world, it is now our source of light during the night
Full transcript