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Microwaves
are a
form
of high frequency radio
waves
similar
to those used by
a
radio including
AM; FM
and CB. They
are,
however, much
shorter than radio
waves; approximately
tive
inches long.
Electricity is
converled into microwave
energy by
the magnetron
tube. From the magnetron
tube, microwave
energy is
transmitted and absorbed.
Reflection
Microwaves
are reflected by metaljust
as a ball is
bounced
otf a wall. A
combination of stationary
(interior
walls)
and
rotating
antenna, located
underneath the
bottom shelf assure
that the microwaves
are
well
distributed within
the oven cavity
to
produce
even heating or cooking
of
foods.
Transmission
Microwaves
pass
through some materials
such
as
paper,
glass
and
plastic
much like
sunlight shining through
a
window
Because
these substances
do
not
absorb or r€tlect the
microwave
energy, they are ideal materials
tor microwave
oven heatino containers.
Absorption
During heatlng, microwaves
will be absorbed by tood. They
oenetrate
to
a deoth of about % to
1'l-inches.
Microwave
energy
excites the
molecules in
the food
(especially
water, fat
and sugar molecules), and
causes them to
vibrate
at a
rate
of
2,450,000,000 times
per
second. This vibration
causes
lriction, and heat is
produced
just
as
you
will feel heat
produced
il
you
vigorously rub
your
hands
together. The
internal
heating of larger foods is done by
conduction.
The
heat which is
produced
by friction
travels by conduction to the
center of the food. Foods
also continue to heat by conduction
during standing time.
Because microwaves
dissipate, much like sunlight
as
it
reaches
the Earth's surface,
they are
not
stored in food.
Radio
lnterference
1. Operation
of
the microwave
oven may cause interference to
your
radio, TV or
similar equipment.
2. When there is
interference,
it may
be
reduced
or eliminated
by taking the following measures:
a. Clean
door and sealing sulaces of the oven. See Care
of Your Microwave
Oven
found
on
page
18.)
b. Place
the
radio, TV,
etc, away from the microwave oven
o-
rcr
o5
Pe--rvrs.
c. Use a
properly
installed
antenna, to obtain stronger
signal reception.
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