On 29/11/2010 11:23, CDB wrote:
>   I've just been sent a little movie cliplet, where 5 geeks and a geekett=
e
> place 4 mobile phones set at 90 degree angles so North/south, East/West o=
n
> the table with aerials pointing towards a cluster of unpopped corn in the
> gap in the middle. The fifth person then phones the phones and the corn
> starts popping before your eyes.
>
a) even at full power equivalent to x4 phones RF fed into an insulated=20
oil bath  I doubt the corn would cook
b) The frequency is wrong for decent RF cooking if GSM or CDMA, even=20
100W (about 50x the possible power) at 900MHz (GSM) won't do it.
c) To do it in open at 2.1GHz (3G) with 500W (125W per phone, or about=20
x800 typical phone power) would take much more than 90s as only a=20
fraction of the RF would go in the corn. This is based on an enclosed=20
2.5GHz 500W "microwave oven" taking about 90s.
d) A phone RF RMS output total (over several minutes) is about  1/2500th=20
of typical Microwave oven. A small fraction is absorbed by nearby=20
objects. Unless it's an iPhone ver 4 :)


> Two things strikes me as odd.
>
> 1. The fifth person must be very quick on the dialing button, unless the
> phone can do multiple dialling within ms or less of each number. Is there=
 a
> loopback phone number for mobiles in the US like land line phones have, t=
o
> test the lines?
>
> 2. It is possible that they throw popped corn into the circle as the came=
ra
> work is a in focus, but hand held and shaky, so with clever cutting it
> could be like the 3 card trick. We see what we are meant to think we are
> seeing.
Video edited

> I suppose I'm wondering if 4 GSM phones (I'm assuming they are GSM) which
> output what 2 or 3 W max really be capable of this?
>
> I don't know 4 people to try the experiment with and I only like toffee
> popcorn.
>
> Colin
>

Yes it's totally fake.
--=20
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