The document summarizes the history and development of the light bulb. It describes how the first light bulb created by Joseph Swan in 1878 could only last 14 hours before failing. Thomas Edison later improved the light bulb through experiments with different filament materials, eventually settling on carbonized bamboo. In the 20th century, tungsten replaced bamboo as it could withstand even higher temperatures as the best filament material. The light bulb symbolizes the transformation of ideas and discoveries into widespread use through industrialization and innovation.

1. Marçal Artigas
Javi Padilla

2. The electric light is composed of a glass bottle
which has a strand of metal, generally tungsten
filament that produces light in movement and
electricity.

3. In 1878 was created the first light bulb that can
give for just 14 consecutive hours. After this
time the bulb stopped working. It was not
coincidental, as the laborious precisametne
Edison had worked 14 months in the search for
a material that would allow the bulb to give
light continuously...

4. It was patented in 1878 by Joseph Wilson
Swan who, after experimenting with over a
thousand different materials, managed to
industrialize with carbonized bamboo
filament. Since then, the world of comics
bulb symbol associated with an idea or an
occurrence. Later, Thomas Alva Edison
improved it.

5. That say that Edison dtid 1200 experiments and
dedicated a fenced investment to $ 850,000 of our
days (580.000 euros). Than 40 people worked on
their laboratio, where more than 6,000 plants
tested before hitting bamboo that was as the most
suitable material for conducting light…

6. The first lamp used carbonized bamboo filament,
which was replaced by tungsten in the XX century
because it was the best material stand temperatures
as high.

7. www.tecnoreyes.org
http://es.wikipedia.org
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