How does a microwave oven work


How Do Microwave Ovens Work?

They’re convenient, ubiquitous and easy to use. But how do these things work, exactly? What do people mean when they say a microwave cooks food inside out?

Arethere any standards that apply to microwave ovens?

Health Canada established the Radiation Emitting Devices Regulations, under theRadiation Emitting Devices Act in order to govern the design, construction andfunction of microwave ovens that are sol leased or imported into Canada.

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How does a microwave oven heat without heat? Find out in the latest installment of Appliance Science, which delves into the physics of microwave ovens.

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How a Microwave Oven Works

Electromagnetic waves such as microwaves go from a positive value to zero to negative and then back to zero. The microwaves pass through foo and as they do, they pass through the molecules that make up food. Most molecules have a positive charge at one en a negative one at the other. As the radio waves pass through a food molecule, the negative part of the molecule rotates to align itself to the positive charge of the wave, and then as the radio wave changes to negative, the molecule rotates again, the positively charged end this time being attracted to the negative charge.

This in effect causes the molecules in the food to rotate, which causes them to have kinetic energy, which they get rid off as heat.