Panasonic NE-1064F - Manual (Page 5)

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 five inches long.
Electricity is converted into microwave energy by
the magnetron tube. From the magnetron tube,
microwave energy is transmitted and absorbed.
Reflection
Microwaves are reflected by metal just as a ball is
bounced off a wall. A combination of stationary
(interior walis) 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 reflect the microwave energy, they
are ideal materials for microwave oven heating
containers.
Absorption
During heating, microwaves will be absorbed by
food. They penetrate to a depth of about % to 1 'A
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 friction, and heat is produced just as you
will feel heat produced if 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 Interference
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 surfaces of the oven.
(See Care of Your Microwave Oven found on
page 17.)
b. Place the radio, TV, etc. away from the
microwave oven as far as possible.
c. Use a properly installed antenna, to obtain
stronger signal reception.
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