1. The Energy Beam JungBeom Lee

2. Table Introduction of energy beam Background information -Current situation -Wireless technologies Details Energy beam effects -society -my life Source

3. Introduction of energy beam “Energy beam” means giving energy to devices on beam No cable, no battery Clean floor Real potable

4. Background information Current situation Electric power station -> consents on wall -> power cables between consents and devices -> Limit of potable devices

5. Background information Wireless technologies -radio : information on wave -cell phone -remote controller : information on far infrared ray

6. Details The idea of Wireless power exist longtime. “At the beginning of the 20th century, Nikola Tesla proposed using huge coils to transmit electricity through the troposphere to power homes.” “Wireless transmission emerged again in the 1960s, with a demonstration of a miniature helicopter powered using microwaves beamed from the ground.”

7. Details there are two kind of options to using energy beam First, Radio wave. It can use Wi-Fi communication and scientists expect to recharge small devices Second, finely focused infrared laser beam. Now, the efficiency is only 15~30% but they try to meat 50%

8. Energy beam effects to society Be free from power cable People can use devices every where Batteries are needed less Pay more for energy Energy waste New way to care diseases Concern about bad effect to our body

9. Energy beam effects to my life hold one multi-contents device Use laptop everywhere Use devices less

10. Source http://www.newscientist.com/article/mg205 27461.300-unplugged-goodbye-cables- hello-energy-beams.htmlhttp://www.newscientist.com/article/mg205 27461.300-unplugged-goodbye-cables- hello-energy-beams.html