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Portables

Submission + - MIT physicist envisions wireless recharging

dpbsmith writes: A Boston Globe story The Vision of an MIT Physicist: Getting rid of pesky rechargers says that Marin Soljacic "has a plan that would mean the end of rechargers."

  "In a paper awaiting publication... he has shown that it is possible to use a carefully designed magnetic field to deliver power to anything within about 10 or 15 feet. To recharge a device, the person would just have to leave it within the field — say, in a home office — where it would pick up power using a built-in antenna without harming anything else in the room."

The device "makes use of a concept in physics called resonance... Soljacic realized that he could build a simple antenna that would resonate with a particular kind of magnetic field, allowing the antenna to draw power while the other objects in the room would not. The field is about as powerful as the earth's natural magnetic field, he said."

What's the opposite of turning over in one's grave? Tesla must be smiling down from heaven...

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