[ILUG] OT: internet access/MMDS - really OT

[sdempsey]

OK , so the 2.45 GHz frequncy spec. spike increases the rotational
energy which has the rather dramatic effect of heating the water. 
I thought that vibrational resonance would heat water. 

I never read up on it though and while I know a bit about DSP and RF 
I can't claim to now much about the physics of water molecules. 
Are there not other risks , besides the obvious heating effects of
radiation within a relatively tight band of 2.45 GHz ??

I suppose that the jury is still out on this. Worrying all the same
considering the proliferation of mobile phones in use at the mo.

I was reading that studies had been carried out on the most popular
phones to 
see which ones emmited the least amount of radiation . That is as
specific as the report got. Totally ignored colour of radiation . 
Anway they found that the motorola phones , star tac in particular were
the 
'safest' by a long way. Why are they radiate less , absorb more. Do
motorola
know someething that the other manufacturers are ignoring ?

Just my >.02 euros worth..

	
	...shane

Paul Curtayne wrote:
> 
> OK, puts on physicist hat.
> 
> (it's been off for a year btw)
> 
> A molecule such as H2O can have many resonant frequencies,
> corresponding to rotation, vibration, and electronic spectra.
> Molecular resonances and the reasons for them are amongst the most
> complex physics known to man or physics student.
> 
> Off the top of my head I do not know why H2O would have a resonance
> around 2.45GHz. This corresponds to a photon energy of around 10 to

e = h * f  ... I presume ...

> the minus 5 eV, which suggests to me rotation. (I think, it's been 4
> years)
> In other words, radiation of this frequency makes the H2O molecule
> rotate strongly in some mode.
> 
> OK, I'll stop now before I get too far off-topic. Incidentally it was
> I who started ths whole thread, sory.
> 
> But it is fascinating.
> 
> Paul
-- 
##########sdempsey at iol.ie sdempsey at emhain.wit.ie########
#######...shane D  http://www.iol.ie/~sdempsey##########
Don't take life so serious, son, it ain't nohow permanent.
		-- Walt Kelly