"Cecil Moore" wrote in message
...
Mike Kaliski wrote:
So there is definitely something significant about the 3 Cm wavelengths
used
in microwave ovens and interaction with water molecules at that
frequency.

From Wikipedia:
"Cooking food with microwaves was discovered by Percy Spencer
while building magnetrons for radar sets at Raytheon. He was
working on an active radar set when he noticed a strange sensation,
and saw that a peanut candy bar he had in his pocket started to melt.
Water, fat, and other substances in the food absorb energy from
the microwaves in a process called dielectric heating. Dipole
rotation is the mechanism normally referred to as dielectric
heating, and is most widely observable in the microwave oven
where it operates most efficiently on liquid water, ..."

I never realized that rotating my dipole was contributing
to global warming. :-)
--
73, Cecil http://www.w5dxp.com

Cecil

Thanks for that. I know that a company called Tappan started producing
domestic microwave ovens as early as 1948 in the US. I have a rebranded
model bought new in the UK in 1980 that's still going strong and in daily
use. I had to open it up once when the lamp blew and took out an internal
fuse. Inside the casing was a full circuit diagram with part numbers and
full contact details for service. American engineering, built like a brick
out house and it does what it says on the box. No turntable, just a glass
shelf and power is either on or off. I have heard that some of the original
1948 models are still working and have no reason to disbelieve it.

Now if only everything else could be built to last like this...

Mike G0ULI