TED Blog – Wireless electricity
December 23, 2012 2 Comments
Induction is not all bad or dangerous. In this video Eric Giler talks about using an electromagnetic field to charge batteries or to power your television.
This is completely save, because it does not use radiative power, but a magnetic field which you can compare with the magnetic field of the earth. By using resonance it only transfers energy to devices that work at exactly the same frequency.
There is more involved than simply two coils, but the basic principle stays the same.