Also note that they say there's a 60W light bulb on the other end -
not that the lightbulb is actually using 60W.  Looked a bit dim in the
pictures I saw.

I doubt much (consumer oriented) is going to come of it.  It likely
has some great applications, but we won't have wireless laptops
anytime soon.

-Adam

On 6/9/07, Peter P. <plpeter2006@yahoo.com> wrote:
> Xiaofan Chen <xiaofanc <at> gmail.com> writes:
>
> > How do you like the idea of Wireless Power Transfer?
> > I think it is really an achievement.
> >
> > http://web.mit.edu/newsoffice/2007/wireless-0607.html
>
> I like the *idea* very much. However, the implementation, not to mention the
> writeup is, err ..., let's see:
>
> 1. "The investigated design consists of two copper coils, each a self-resonant
> system. One of the coils, attached to the power source, is the sending unit.
> Instead of irradiating the environment with electromagnetic waves, it fills the
> space around it with a non-radiative magnetic field oscillating at MHz
> frequencies. The non-radiative field mediates the power exchange with the other
> coil (the receiving unit), which is specially designed to resonate with the
> field. The resonant nature of the process ensures the strong interaction
> between the sending unit and the receiving unit, while the interaction with
> the rest of the environment is weak."
>
> 2. (elsewhere) ... light a 60 W lightbulb at a distance ... copper coils
> ... MHz range
>
> Right, so we have a 'non-radiative' RF field of 'MHz range' that lights a 60W
> lightbulb at some distance. We also know that 'non radiative' RF fields of 'MHz
> range' are used for diathermy in physiotherapy and other branches of the medical
> profession. So the 'small interaction' with 'biological tissue' is 'important
> for safety'.
>
> So basically it's an oversized electric toothbrush charger that doubles as
> diathermy unit and local broadcast jammer (as well as a firestarter if the
> right size of coiled wire is anywhere in the building within range and can be
> heated sufficiently by the injected energy), with a MIT brand for a good
> start ?
>
> Sorry for being sarcastic but I have my limits.
>
> Peter P.
>
>
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