Thomas edison talks

the history of lightbulb

The electric bulb was invented by the American Thomas Alva Edison, the inventor was successful self despite their limited economic resources, went ahead with efforts to overcome major obstacles and unleash their creative genius and tremendous capacity.
This small device, came to replace the old street lighting by arc, which was rejected by various technical problems. The first vials of Edison, were composed of a carbon filament, obtained from bamboo.
At present the material that is manufactured, the filament must have a very high melting point because it needs higher temperature so that the ratio of light energy and thermal energy generated by the filament is profitable. The first bulbs (bulbs), using carbon filaments, but today are manufactured with extremely thin wire of tungsten or tungsten, whose melting temperature of 3410 degrees. The wire is so thin that the displacement of electric charges does the temperatures reach about 2500 degrees, at these temperatures, the tungsten oxidizes and evaporates into the air. To lessen this problem, the filament is enclosed in glass bulb.

Thomas Alva Edison and the lightbulb

In 1879 Thomas Alva Edison lived on for thirteen and a half hours the first electric light bulb or incandescent filament in New Jersey (United States).