Chem+A+D+Per+Group+6


 * The electric lightbulb was first invented in 1879 by Thomas Edison.
 * Previous to the acutal invention, scientists had been working on developing the light bulb over 20 years previous to it's said date.
 * Gas lighting had already been established and people had already become used to it's convenience
 * Edisons first light bulb developed could glow for over 1500 hours.
 * Light bulbs have evolved so much that they acutally come in different colors now! Yellow, pink, green , orange ,  blue  and purple !
 * Light Bulbs were fist made by using a carbon filament, instead of a tungsten one.
 * The first person to give the idea of the lightbulb was Joseph W. Swan, who began trying to work on his ideas a few years prior to Edison.
 * Some key people involved in the inventing of the light bulb are Sir Humphrey Davy, Warren De la Rue, James Bowman Lindsay, James Prescott Joule, Frederick de Moleyns, and Heinrich Gobel.

The image to the left was the first basic design for the light bulb. The coiled filament in the center of the bulb was the key element in the invention of this world changing product. The development of the bulb didn't end at Edison's first design. The following years, scientists changed and twisted the design so that it was easier and more useful. In 1902, Willis Whitney founded a treatment for the inside of the bulb so that when the filament glowed, the inside of the acutal bulb would not be dark. Electricity runs through the coiled tungsten filament, causing the temperature of the element to rise. Once the temperature rises, the excited electrons let go of visible protons which devolops a radiation ( the yellow light) visible to the human eye. Many light bulbs also included mercury, which give off a light as well inside of the bulb. The bulb has a carbon filament inside of it free of oxygen as well. Without chemistry involved in the making of the light bulb, we would not be able to see the bright glow of light we see every day!
 * __Chemistry Involved:__**
 * http://www.emsb.qc.ca/laurenhill/science/light.pdf
 * http://www.emsb.qc.ca/laurenhill/science/light.pdf
 * http://www.emsb.qc.ca/laurenhill/science/light.pdf

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