[LINK] wireless power

[Adam Todd]

At 06:24 PM 15/11/2006, Eric Scheid wrote:

>http://news.bbc.co.uk/2/hi/technology/6129460.stm
>
> > And because we're physicists we asked, 'what kind of physical 
> phenomenon can
> > we use to do this wireless energy transfer?'." The answer the team came up
> > with was "resonance", a phenomenon that causes an object to vibrate when
> > energy of a certain frequency is applied.
> >
> > Instead of using acoustic vibrations, the team's system exploits the 
> resonance
> > of electromagnetic waves. Electromagnetic radiation includes radio waves,
> > infrared and x-rays.
>
>what next, internet over wireless power?

Well technically that's just wifi.  If you really wanted to, you could use 
the energy from wifi frequencies to generate power.  However given that the 
power of the transmissions is so small, I doubt it would be useful, even if 
accumulatively collected from a broad range of channels.


This isn't a new concept anyway.  We use to sit in Service stations at 
night when the lights were out and use our radios to power the florescent 
tubes.

It doesn't take much to light a tube, however, it doesn't take much power 
from a CB radio to create power in a remote collector.