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temperatureofthefoodasawholequickly
rises.
Metalfoilandutensilscanbeputinthe
microwaveovenwithmoistfoodswithout
causingproblems,providedthey’re
reasonablylargeandkeptsomedistancefrom
thewallsandeachothertopreventarcing.
Finemetallicdecorationonchinawillspark
andsufferdamage.Foilisusefulforpartly
shieldingsomefoodsfromtheradiation,the
thinedgesoffishfillets,forexample.
Microwaveovensarearecentinvention.In
1945Dr.PercySpencer,ascientistworking
forRaytheoninWaltham,Massachusetts,
filedapatentfortheuseofmicrowavesin
cookingafterhehadsuccessfullypoppedcorn
withthem.Thiskindofradiationhadalready
beenusedindiathermy,ordeepheat
treatmentforpatientswitharthritis,aswellas
incommunicationsandnavigation.
Microwaveovensbecameapopularappliance
inthe1970s.
Advantages
and
Disadvantages
of
Microwaves Microwave radiation has one
great advantage over infrared: the fact that it
cooks food much faster. Microwaves can