The discovery of light bulb

1. The discovery of light bulb Yi Zhang yqz5135 Jiayu Fang jqf5138 Zhuyu Wang zxw118 Naixi Sun nzs138

2. Overview • History of Light Bulb • Current Light Bulb • Future Technologies • Conclusion

3. The History of Invention the light bulb we see today took 80 years to develop The credit of discovery was shred in mystery and controversy. Our team will walk you through the development of modern light bulbs, and examine its importance on our daily lives. The first idea of electric lighting was invented by an English chemist, Humphrey Davy The concept of light bulb came into existence in 1820

4. The history of invention Breakthrough was made at the end of 1800s when Joseph Swan and Thomas Edison independently develop a method to employ carbon fiber filament, which could last 13.5 hours. The two went through years of legal struggle to claim the invention, but Edison was the one who received all the credit. Though modern day light bulb could be used for 1200 hours, we should never underestimate the importance of early development.

5. Thomas Edison (February 11, 1847 – October 18, 1931) He was born in Milan ,Ohio. An inventor, scientist ,and businessman Inventions: the phonograph, the motion picture camera, and a long-lasting, practical electric light bulb.

6. Light Bulb Today There are two types of light bulbs in common use today Incandescent light bulb, which heats the filment to a temperature that produces light. There is a stream of electrons flowing between the electrodes at both ends of the fluorescent bulb. The electrons interact with mercury vapor atoms floating inside the bulb. The photons collide with the phosphor coating the inside of the bulb, and the phosphor creates visible light.

7. Comparison Between Incandescent and fluorescent Light Bulb Find two charts comparing the incandescent an fluorencent light bulgs

8. Future Light Bulbs Light-emitting diode is the most interested subject under research nowadays When a LED is switched on, electrons are able to release energy in the form of photons. An LED presents many advantages over traditional light sources including lower energy comsumption, longer lifetime, and greater reliability.

9. Comparison Between current technology and LEDs

10. The impact on the society Throughout the long history of utilizing the light bulbs by human beings, it can be seen apparently that people¡¯s life has totally been improved by the light bulbs.

11. The impact on the society Illuminating a room without candles, the light bulbs get rid of the danger that the candles bring, can be turned on and off convenient.

12. The impact on the society Since a light bulb has a long life span which is approximately about 40 hours, people do not have to replace it as often as replace candles. In general, people’s working time is no longer limited by the day light, and people possess more opportunities of knowing new things from using light bulbs. As one of the most significant inventions during the industrial revolution, light bulbs impact the entire society in considerable ways.

13. The impact on the society In general, people’s working time is no longer limited by the day light, and people possess more opportunities of knowing new things from using light bulbs. As one of the most significant inventions during the industrial revolution, light bulbs impact the entire society in considerable ways.