Katie Hall was shocked the second she saw it: a light-bulb glowing in middle of a room with no wires attached.
Looking back, it was a crude experiment, she remembers: a tiny room filled with gigantic cooper refrigerator coils -- the kind you'd see if you cracked open the back of your freezer.
She walked in and out between the coils and the bulb -- and still the bulb glowed.
"I said: 'Let's work on this. This is the future.'"
What's the trick?
"We're going to transfer power without any kind of wires," says Dr Hall, now Chief Technology Officer at WiTricity -- a start-up developing wireless "resonance" technology...