Saturday, February 12, 2011

The Light Bulb




In 1879, Thomas Edison created his first version of the light bulb. This early version worked by passing electricity through a thin platinum filament in the glass vacuum bulb, however the light soon burned out in a matter of hours. The following year Edison came up with a different approach in which he substituted a carbonized cotton thread filament in for the previously used thin platinum filament.  This new design produced an orange glow that lasted 15 hours. Because of the developement of the light bulb people were now able to access long lasting light without the constrants of sunlight or the danger of lanterns.

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