SPOTLIGHT: Cutting the last cord, going truly wireless


Okay, admit it: Your mobile phone isn't always wireless and isn't always mobile. It still needs a wire to charge up. With a nod toward Nikola Tesla, researchers at MIT are developing a way to transfer energy 10 ft. to 15 ft. through the air using a special class of "non-radiative" objects with so-called "long-lived resonances." If you bring a resonant object (cell phone) with the same frequency as another resonant object (power source), energy will tunnel from one object to the other. As the BBC article puts it: "A simple copper antenna designed to have long-lived resonance could transfer energy to a laptop with its own antenna resonating at the same frequency. The computer would be truly wireless." Article

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