Now,wireless is fashion,wireless is smartness.But still now,for tranfering electricity,we have to use wire.Still we have to connect our TV with wire,we have to connect our Laptop charger or desktop PC with wire,We have to mange wire in meeting room for sound accommodation.Can you imagine how boring it is !! But this age is going to be end.Now, scientist try to pass electricity via air instead of wire.WiTricity, a company that's able to power light bulbs using wireless electricity that travels several feet from a power socket, version of wireless electricity -- which converts power into a magnetic field and sends it sailing through the air at a particular frequency -- still needs to be refined a bit, they hope, but should be commercially available soon.
Engineers have developed several ways to convert electricity into something that's safe to send through the air without a wire. Some of their technologies are available on commercial scales, but they have some limits.
Low-level power :One set of researchers is able to send power over long distances but in very small amounts.
Power pads :Another type of wireless electricity technology can send large amounts of power over very small distances, often not more than a few centimeters.
Magnetically coupled resonance :Ultimately, Giler's group from MIT wants to combine the best of both worlds: large amounts of power sent over long distances. Their technology is called "magnetically coupled resonance," and it basically sends a magnetic field through the air at a specific frequency that an an enabled phone or TV can pick up and turn back into electricity. It works kind of like sound. Think about how an opera singer can break a wine glass if he sings at just the right frequency. Adding the technology to cell phones, mp3 players and other devices should not increase their cost much, he said.
Image and article courtesy by www.cnn.com
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