Arfa Daily wrote:
"William Sommerwerck" wrote in message
...
Microwaves do not 'bounce around' in the oven. Microwaves are
directional, that's why you move the food. The microwave emitter
does not move.
On some cookers, that isn't strictly true.
To quote Galileo: "Nevertheless, it does move." Once upon a time,
microwave
ovens had a "stirrer", a fan that "moved" the standing-wave pattern around
the oven cavity.



Eggzackerly ! One of those references that I gave, also refers to rotating
antennas. Both of these devices for altering the microwave pattern, are
placed in or at the exit of the waveguide, which by definition forms part of
"the emitter".

Remember those old Philips machines? where the magnetron was at the
bottom and fired the magic rays into an aluminium 'fan' which was
mounted beneath the glass floor of the oven. the reflector was propelled
by the draught from the magnetron cooling fan whereupon the microwaves
were reflected upwards through the glass floor of the cavity and onwards
and upwards into the food.

Ron