What is the filament in a light bulb made of
- how is a light bulb made
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How does a light bulb work
How does a light bulb work in a circuit.
Light Bulb
Background
From the earliest periods of history until the beginning of the 19th century, fire was man's primary source of light. This light was produced through different means—torches, candles , oil and gas lamps.
Besides the danger presented by an open flame (especially when used indoors), these sources of light also provided insufficient illumination.
Parts of a bulb class 6The first attempts at using electric light were made by English chemist Sir Humphry Davy. In 1802, Davy showed that electric currents could heat thin strips of metal to white heat, thus producing light. This was the beginning of incandescent (defined as glowing with intense heat) electric light.
The next major development was the arc light.
How are light bulbs made for kids
This was basically two electrodes, usually made of carbon, separated from each other by a short air space. Electric current applied to one of the electrodes flowed to and through the other electrode resulting in an arc of light across the air space.
Arc lamps (or light bulbs) were used mainly in outdoor lighting; the race was still on among a large group o
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