2. When was the first light bulb invented? Thomas Edison created the first light bulb in 1879. BUT, Humphrey Davy created the first light in 1800.
3. Who invented the first light bulb? Humphrey Davy created the first light using an arc lamp. The arc lamp took to much power for use in residential houses. They use arc lamps in lighthouses because they are super bright. Edison bought the idea of the light bulb from to inventors and patented it.
4. What materials were originally used to make the light bulb? Humphrey Davy connected wires to a battery and a piece of charcoal, which made an intense spark. This became known as the electric arc lamp. Thomas Edison then used a filament housed in a glass vacuum bulb. He then passed electricity through this which lit the bulb.
5. How was Edison’s light bulb originally made? Edison used a carbon filament that burned for forty hours. The carbon filament was put in an oxygen-less glass bulb.
6. What improvements to the light bulb have been made over the years? 1920s-1930s:Adjustable power beam bulbs, fluorescent lighting, and one time flash bulbs. 1940s-1950s: "Soft light" incandescent bulbs, halogen and infrared light, and the first light emitting diode (LED). 1960s: The increase in the efficiency and capacity of LED technology. The Late 20th and Early 21st Centuries: The first full spectrum and near-full spectrum light bulbs.
7. Why were such improvements made? 1920’s-1930’s: Most improvements were made mainly to improve photography technology 1940’s-1950’s: Improvements made to invent the first LED lights. 1960’s: Improvements to the LED light bulbs and flash lights to make them more efficient. The late twentieth and early 21’st centuries: Improvements made to be more eco-friendly and better the marketing of full spectrum incandescent light bulbs.
8. Who uses the product? Light can be used to keep food warm using a heat lamp. They can be used to incubate chickens. They can also be found in lighthouses.
9. Works Sited Who Invented the light bulb?. (2007). Retrieved from http://www.professorshouse.com/your-home/decorating-design/who-invented-light-bulb.aspx Who Invented the light bulb?. (2008). Retrieved from http://www.google.com/imgres?imgurl=http://media.readersdigest.com.au/dynamic/92/22/57/GB_light_bulbcrop.jpg&imgrefurl=http://www.readersdigest.com.au/discovery-channel-mag/who-invented-the-light-bulb/article91603.html&usg=__PdtAScjF8zCLFfrs62nQi7rwBkw=&h=352&w=520&sz=10&hl=en&start=138&zoom=1&tbnid=JTnCyMzjDIMmkM:&tbnh=126&tbnw=148&prev=/images%3Fq%3Dlight%2Bbulb%26um%3D1%26hl%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-us%26biw%3D1419%26bih%3D690%26tbs%3Disch:10%2C2588&um=1&itbs=1&iact=rc&ei=lFCGTMGiKsienAey0p3sAQ&oei=wk-GTJ2wJJOKnAf5nMz4DQ&esq=8&page=5&ndsp=36&ved=1t:429,r:28,s:138&tx=40&ty=76&biw=1419&bih=690&safe=active
10. Irene, G. (2009, June 30). How much Coal can a cfl save?. Retrieved from Who Invented the light bulb?. (2008). Retrieved from http://www.google.com/imgres?imgurl=http://media.readersdigest.com.au/dynamic/92/22/57/GB_light_bulbcrop.jpg&imgrefurl=http://www.readersdigest.com.au/discovery-channel-mag/who-invented-the-light-bulb/article91603.html&usg=__PdtAScjF8zCLFfrs62nQi7rwBkw=&h=352&w=520&sz=10&hl=en&start=138&zoom=1&tbnid=JTnCyMzjDIMmkM:&tbnh=126&tbnw=148&prev=/images%3Fq%3Dlight%2Bbulb%26um%3D1%26hl%3Den%26safe%3Dactive%26sa%3DN%26rls%3Dcom.microsoft:en-us%26biw%3D1419%26bih%3D690%26tbs%3Disch:10%2C2588&um=1&itbs=1&iact=rc&ei=lFCGTMGiKsienAey0p3sAQ&oei=wk-GTJ2wJJOKnAf5nMz4DQ&esq=8&page=5&ndsp=36&ved=1t:429,r:28,s:138&tx=40&ty=76&biw=1419&bih=690&safe=active Crane, C. (2010). Cc vivid 120v led light bulb. Retrieved from http://www.ccrane.com/lights/led-light-bulbs/cc-vivid-led-light-bulb.aspx
11. Marković, D. (2010). The Second industrial revolution. Retrieved from http://www.b92.net/eng/special/tesla/life.php?nav_id=36502 Arc lamp. (2010). Retrieved from http://www.magnet.fsu.edu/education/tutorials/museum/arclamp.html Thomas edison facts. (n.d.). Retrieved from http://thomasedisonfacts.com/ Westcott, T. (2007 , november 26). Astronomy picture of the day. Retrieved from http://apod.nasa.gov/apod/ap071126.html Great Idea Finder. (n.d.). Light bulb. Retrieved from http://www.ideafinder.com/history/inventions/lightbulb.htm The Franklin Institute. (n.d.). Edisons light bulb. Retrieved from http://www.fi.edu/learn/sci-tech/edison-lightbulb/edison-lightbulb.php?cts=electricity
12. Lebednik, C. (2009, November 11). How has the Light bulb changed over the years?. Retrieved from http://www.ehow.com/about_5631574_lightbulb-changed-over-years_.html#ixzz0z2phovQz Enchanted Learning. (2010). The Invention of the light bulb: Davy, Swan and Edison. Retrieved from http://www.enchantedlearning.com/inventors/edison/lightbulb.shtml Blank, C. (2009, August 13). Materials used in a light bulb. Retrieved from http://www.ehow.com/about_5296586_materials-used-light-bulb.html
