Panasonic NE-1064F NE1064T User Guide - Page 5

Reflection, Transmission, Absorption, Radio, lnterference

Page 5 highlights

Microwaveasrea tormof highfrequencyradio wavessimilarto thoseusedby a radioincluding AM,FMandCB.Theyare,howeverm, uchshorter thanradiowaves;approximatelfyiveincheslong. Electricitiys convertedintomicrowave nergyby themagnetrotnube.Fromthe magnetrontube, microwavenergyls transmittedandabsorbed. Reflection lvlicrowaveasreretlectedby metaljustas a ballis bouncedotfa wall.A combinationof stationary (interiowr alls)androtatingantennal,ocated underneatthhebottomshelfassurethatthe microwaveasrewelldistributedwithintheoven cavityto produceevenhealingor cookingof foods. Absorption Duringheatingm, icrowavewsillbeabsorbedby food.Theypenetrateto a depthol aboul%to 1'A inches.Microwave nergyexcitesthe moleculesin thefood(especiallwy ater,fatandsugar molecules)a,ndcausesthemto vibrateat a rateof 2,450,000,00t0imespersecond.Thisvibration causestriction,andheatis producedjustasyou willfeelheatproducedif youvigorouslyrubyour handstogetherT. heinternahl eatingot largerioods isdonebyconductionT.hehealwhichis produced byfrictiontravelsbyconductionto thecenterof the food.Foodsalsocontinueto heatbyconduction duringstandintgime. Becausemicrowavedsissipatem, uchlikesunlight asit reachesthe Earth'ssurfacet,heyarenot storedin food. Transmission Microwavepsassthroughsomematerials uchas paperg, lassandplasticmuchlikesunlighsthining througha windowB. ecausethesesubstancedso notabsorbor refleclthe microwave nergyt,hey areidealmaterialsfor microwaveovenheatino contarners. Radiolnterference 1.Operationof themicrowavoevenmaycause interferencteo yourradio,TVor similaer quipment. 2. Whenthereis interferenceit,maybereducedor eliminatebdytakingthefollowinmg easures: a. Cleandoorandsealingsurtacesof theoven. (SeeCareof YourMicrowaveOvenloundon page17.) b. Placethe radio,TV,etc.awayfromthe microwaveovenastar as oossible. c. Usea properlyinstalledantennat,o obtain s t r o n g esr i g n arl e c e p t i o n . -5-

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Microwaves
area tormof high
frequency
radio
waves
similar
to those
usedby a radio
including
AM,
FMandCB.
They
are,
however,
much
shorter
thanradio
waves;
approximately
five
inches
long.
Electricity
is converted
intomicrowave
energy
by
the magnetron
tube.From
the magnetron
tube,
microwave
energy
ls transmitted
andabsorbed.
Reflection
lvlicrowaves
are retlected
by metal
just
as a ball
is
bounced
otf a wall.
A combination
of stationary
(interior
walls)
and rotating
antenna,
located
underneath
thebottom
shelf
assure
thatthe
microwaves
arewelldistributed
within
the oven
cavity
to
produce
evenhealing
or cooking
of foods.
Transmission
Microwaves
pass
through
somematerials
suchas
paper,
glass
and
plastic
much
like
sunlight
shining
through
a window.
Because
these
substances
do
notabsorb
or reflecl
the microwave
energy,
they
areideal
materials
for microwave
ovenheatino
contarners.
Absorption
During
heating,
microwaves
will be absorbed
by
food.
Theypenetrate
to a depth
ol aboul
%
to 1'A
inches.
Microwave
energy
excites
the molecules
in
thefood (especially
water,
fat andsugar
molecules),
andcauses
them
to vibrate
at a rate
of
2,450,000,000
times
per
second.
This
vibration
causes
triction,
andheat
is produced
just
as you
will
feel heatproduced
if youvigorously
rubyour
hands
together.
Theinternal
heating
ot larger
ioods
is doneby conduction.
The healwhich
is produced
by friction
travels
by conduction
to the center
of the
food.
Foods
alsocontinue
to heat
by conduction
during
standing
time.
Because
microwaves
dissipate,
much
like
sunlight
as it reaches
the Earth's
surface,
theyarenot
stored
in food.
Radio
lnterference
1. Operation
of themicrowave
oven
may
cause
interference
to your
radio,TV
or similar
equipment.
2. When
thereis interference,
it maybe reduced
or
eliminated
bytaking
thefollowing
measures:
a. Clean
doorandsealing
surtaces
of the oven.
(See
Careof Your
Microwave
Oven
loundon
page
17.)
b. Place
the radio,
TV, etc.away
from
the
microwave
oven
as tar as oossible.
c. Usea properly
installed
antenna,
to obtain
stronger
signal
reception.
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