Microwaves and How They are Used

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Microwaves were made based on electromagnetic energy. The theory was that when electromagnetic energy was applied to a certain substance, for example cold food, the energy would seep into the chemical composition of the food item and alter it in such a way that the food became hot. What happens is the energy that enters the chamber where the food item sits is trapped there. The energy can only circle inside. This creates a highly dense electromagnetic field. This caused pressure to build up inside the material which forced the molecules in the food to rotate. This rotation became very fast until friction built up. When you have friction you have heat. This is how food is heated in a microwave oven. And it all works from electromagnetic energy.

Microwave systems use waveguides to direct the frequency of the electromagnetic energy to the output section that distributes the energy into the chamber. These waveguides keep the frequency at a certain level and does not allow this frequency to rise above that level based on the structure and size of the waveguide. A power divider is often used in a microwave to couple the frequency or power that comes from the waveguide and distributes that power evenly so as to make sure that there is an even flow of energy throughout the chamber.

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