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HOW MICR- OVENS WORK
Microwave ovens are safe. Microwave energy is not hot. It causes food to
make its own heat, and it’s this heat that cooks the food
Microwaves are like TV
waves or light waves. You
can’t see them, but you can
see what thev do.
Microwaves pass through
glass, paper and plastic
without heating them so food
absorbs the energy. Micro-
waves bounce off metal pans
so food does not absorb the
energy.
Oven Cavity
Metal Floor
A magnetron in the micro-
The ceramic bottom of your
wave oven produces
microwave oven lets micro-
microwaves. The microwaves
waves through. Then they
move into the oven where
bounce off a metal floor,
they are scattered or stirred
back through the ceramic
by a mode mixer [ like a fan).
bottom and are absorbed by
Microwaves bounce off
the food.
metal oven walls and are
absorbed by food.
Microwaves may not reach
The microwaves disturb
the center of a roast. The heat
water molecules in the food.
around the outside is what As the molecules bounce
cooks the roast all the way
around bumping into each
through. This is one of the other, heat is made, like rub-
reasons for letting some bing your hands together.
foods (roasts, baked pota- This is the heat that cooks.
toes] stand for a while after
cooking, or for stirring some
Ceramic Bottom
foods during the cooking time.