the microwave oven introduction. the microwave oven f form of energy that travels like radio waves f...
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The Microwave OvenThe Microwave Oven
IntroductionIntroduction
The Microwave OvenThe Microwave Oven
Form of energy that travels like radio waves Magnetron (MAG-nuh-trahn) tube turns
electricity into microwaves Microwaves are distributed throughout the
oven by a stirrer blade which is a fan like device
Microwaves bounce off the oven’s walls and floor until they are absorbed by food
Microwave energy is reflected from metal but will pass through glass, paper, and plastic
Form of energy that travels like radio waves Magnetron (MAG-nuh-trahn) tube turns
electricity into microwaves Microwaves are distributed throughout the
oven by a stirrer blade which is a fan like device
Microwaves bounce off the oven’s walls and floor until they are absorbed by food
Microwave energy is reflected from metal but will pass through glass, paper, and plastic
Invention of the Microwave
Invention of the Microwave All started one morning
in 1945 Dr. Percy Spencer
Scientist Working in his lab Felt heat on his hands
Microwaves Placed a chocolate bar
where the heat was located
Within seconds the chocolate melted
This was the beginning of the idea of using microwaves in cooking
All started one morning in 1945
Dr. Percy Spencer Scientist Working in his lab Felt heat on his hands
Microwaves Placed a chocolate bar
where the heat was located
Within seconds the chocolate melted
This was the beginning of the idea of using microwaves in cooking
Parts of the MicrowaveParts of the Microwave
Door Metal wire mesh Allows you see but
the microwave can not get out
Door Metal wire mesh Allows you see but
the microwave can not get out
Parts of the MicrowaveParts of the Microwave
Magnetron TubeChanges electricity to microwave
energyLooks like a radio or TV tubeShould last for 3,000 hours of use
(10 years)
Magnetron TubeChanges electricity to microwave
energyLooks like a radio or TV tubeShould last for 3,000 hours of use
(10 years)
Parts of the MicrowaveParts of the Microwave
Cavity The inside of the
microwave Stainless steel Glass tray on the
bottom
Cavity The inside of the
microwave Stainless steel Glass tray on the
bottom
Parts of the MicrowaveParts of the Microwave
FanWhat you hear when the microwave is
runningHelps cool the magnetron tube
FanWhat you hear when the microwave is
runningHelps cool the magnetron tube
Parts of the MicrowaveParts of the Microwave
Stirrer Looks like a fan Moves the
microwave around the cavity
Stirrer Looks like a fan Moves the
microwave around the cavity
Parts of the MicrowaveParts of the Microwave
Wave GuideA pipe that carried the microwaves
from the magnetron tube to the cavity
Wave GuideA pipe that carried the microwaves
from the magnetron tube to the cavity
Power LevelsPower Levels
100% Tube is producing microwaves the
entire time50%
in one minute the magnetron tube is only working for 30 seconds
100% Tube is producing microwaves the
entire time50%
in one minute the magnetron tube is only working for 30 seconds
Hot SpotsHot Spots
Microwave are not sent through the stirrer evenly throughout the microwave
The turntable will help with even cooking
Microwave are not sent through the stirrer evenly throughout the microwave
The turntable will help with even cooking
Experiment with Hot SpotsExperiment with Hot Spots1.Place a Piece of wax paper on the bottom of
the microwave covering the entire surface2.Place 5 marshmallows on the wax paper
One in each cornerOne in the center
3. Turn Microwave to 100% Power4. If the stirrer is sending out even microwave
the marshmallow will all grow at the same rate and size
5.Marshmallows that get big first are the hot spots in your microwave
1.Place a Piece of wax paper on the bottom of the microwave covering the entire surface
2.Place 5 marshmallows on the wax paperOne in each cornerOne in the center
3. Turn Microwave to 100% Power4. If the stirrer is sending out even microwave
the marshmallow will all grow at the same rate and size
5.Marshmallows that get big first are the hot spots in your microwave
Microwavable ContainersMicrowavable Containers
Microwave will pass throughGlassPlasticPaperWoodStraw
Microwave will pass throughGlassPlasticPaperWoodStraw
Microwaveable ContainersMicrowaveable Containers
DO NOT USE METAL IN THE MICROWAVE
DO NOT USE METAL IN THE MICROWAVE
Standing TimeStanding Time
Food continues to cook when removed from the microwave
Cook foods until just almost doneRemove Let stand until they are finished
cooking
Food continues to cook when removed from the microwave
Cook foods until just almost doneRemove Let stand until they are finished
cooking
Cook TimesCook Times
Most foods cook in the microwave in 1/3 of the time
Most foods cook in the microwave in 1/3 of the time
Help with food cookingHelp with food cooking
Stir FoodsPlace in circular formation
Stir FoodsPlace in circular formation