colin wrote:
> "Peter Hucker" <none@spam.com> wrote in message
> news:op.tmvmmskc4buhsv@fx62...
> 
> > On Sun, 28 Jan 2007 15:35:16 -0000, Snap Whipcrack..............
> > 
> <snapw@aol.com> wrote:
> 
> > > Peter Hucker wrote:
> > > 
> > > > On Tue, 23 Jan 2007 16:49:43 -0000, Snap Whipcrack..............
> > > > 
> <snapw@aol.com> wrote:
> 
> > > > > Peter Hucker wrote:
> > > > > 
> > > > > > Is it really true that turning on a microwave with nothing in it will
> > > > > > 
> break it?
> 
> > > > > > Even more worrying - will it catch fire or explode?
> > > > > > 
> > > > > > Don't they have a safety cutout?  Can't it sense the Klystron
> > > > > > 
> overheating, or a build up of microwaves over a certain level?
> 
> > > > > > I have purchased a new microwave which has an easier to grab control.
> > > > > > 
> I'm concerned one of my pet parrots will switch it on!  (Seriously, they do
> stuff like that)
> 
> > > > > Microwave ovens don't care what you put inside. They do not have
> > > > > feedback loops.  You can cook a raisin or a melon or nothing at all.
> > > > > 
> > > > But where do you think the power ends up if it is not absorbed?
> > > > 
> > > > 
> > > Same question, where do the light waves go from the light inside the
> > > microwave? Same energy, just higher frequency and lower power. Same
> > > place as the microwaves.
> > > 
> > Light is absorbed into all sorts of things.  Microwaves are NOT absorbed
> > 
> into anything inside the oven.  They are reflected completely by the metal
> sides.
> 
> not completly, even if they were silver coated it would still not be quite
> 100%,
> it bounces back and forth so quickly eventually even the smallest loss gets
> multiplied suficiently to absorb considerable energy.
> 
> Colin =^.^=
While the microwave is bouncing around in the oven there will be 
locations where the signal combines to generate
high voltages and other places where high currents are generated. These 
locations can be in side of the  Magnetron.

Bill K7NOM