THE INCANDSCENT LIGHTBULB Keeping the World AWAKE GRACE WIJAYA INCANDESCENT LIGHT BULB: AN ELECTRIC LIGHT WHERE FILAMENT IS HEATED TO INCANDESENCE THROUGH AN ELECTRIC CURRENT. The invention of the light bulb is credited to Joseph W Swan and Thomas A Edison. Almost 90% of the power used by an incandescent light bulb is emitted as heat, rather than visible light Ne Fe SiO2 Ni Kr Mo Ar W N Ar GLASS BULB SILICA •Glass is mostly made of Silicon Dioxide (SiO2) •Found in the form of sand or quartz •Most plentiful mineral found throughout the Earth’s Lithosphere, including Canada SiO2 Mo SUPPORT WIRES MOLYBDENUM •Known for its ability to withstand extreme temperatures •Found in aircraft parts, electrical contacts, etc. •Commonly found in the United States, China, Chile, Peru, and Canada in minerals such as wulfenite and gowelite FILAMENT TUNGSTEN W •Replaced previous filaments made of carbon •Known for its robust physical properties – highest melting point amongst non-alloyed metals •Found in the minerals wolfamite, maganese tungstate, etc. •Over 35000 tons of tungsten concentrates mined per year •China mines 75% followed by Austria, Bolivia, Portugal, and Russia Fe Ni CONTACT WIRES NICKEL, IRON •Nickel and Iron alloy believed to be a large portion of Earth’s Core •Nickel is mainly mined in the Sudbury region in Canada, New Caledonia, and Norilsk in Russia •Iron ore is mostly mined in the US, Eastern Canada, Brazil, and Australia CAP ALLUMINUM ALLOY •Alloys known for their strength, workability, weldability, corrosion resistance, and ductility etc •Used extensively in modern aircraft – great strength to weight ratio •Found mainly in Australia, China, Brazil, India, Guinean, Jamaica, Russia etc. Al RESOURCES: http://typesoflightbulbs.com/images/Incandescent_Light_Bulb.png http://www.howstuffworks.com/light-bulb.htm http://www.answers.com/topic/incandescent-light-bulb http://www.apartmenttherapy.com/uimages/dc/light-bulb.gif http://www.webresourcesdepot.com/wp-content/uploads/image/free-vector-worldmap.gif http://mirror-us-ga1.gallery.hd.org/_exhibits/light/_more2003/_more05/light-bulbglowing-filament-light-blue-uncropped-3-AHD.jpg http://en.wikipedia.org http://shadow.eas.gatech.edu/~kcobb/energy/earth_at_the_night_1024x768.jpg Today, incandescent light bulbs are being replaced by fluorescent light bulbs, and LEDs for more energy efficient lighting, however, it is important to keep in mind that this was the light bulb that initially brought the common population out of the darkness during the night, a constant source of dependable light. THANKS FOR VIEWING!