03:51 - Source: CNN
Is wireless electricity within reach?

Story highlights

Dr Katie Hall is developing ways to transfer power without wires

In the home of the future, wireless energy will be as common as Wi-Fi, she believes

The technology could lead to new and revolutionary medical devices

CNN —  

Katie Hall was shocked the second she saw it: a light-bulb glowing in the middle of a room with no wires attached.

Looking back, it was a crude experiment, she remembers: a tiny room filled with gigantic copper 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 startup developing wireless “resonance” technology.

“But, we’re not actually putting electricity in the air. What we’re doing is putting a magnetic field in the air.”

It works like this: WiTricity builds a “Source Resonator,” a coil of electrical wire that generates a magnetic field when power is attached.