Why can high speed accelerated cooking countertop oven heat food?

Why can high speed accelerated cooking countertop oven heat food?

Commercial microwave oven

In this "smell cancer" era, "microwave heating to produce carcinogens" has become a widely accepted "belief" over and over again. Xiaobian starts with a microwave oven to heat food, to introduce the characteristics of the microwave oven, and to analyze some rumors about the high speed accelerated cooking countertop oven.

Why can commercial microwave ovens heat food?

Let us start from the water. The water molecule is composed of an oxygen atom and two hydrogen atoms. The oxygen atom is very attractive to electrons, so the electrons in the water molecule are concentrated at the end of the oxygen atom, and the corresponding hydrogen atom is less. On the whole, one end of the water molecule is positively charged and the other end is negatively charged. Chemically, such molecules are called polar molecules.

In the usual water, the water molecules are arranged in disorder, and the positive and negative electric impulses are in either direction. When the water is in the electric field, the positive side will turn to the negative pole of the electric field, and the negative side with the negative electric current will turn to the positive pole of the electric field. The so-called "heterosexual attraction, homosexual repelling".

If it is a static electric field, the water molecules will be quiet when they line up. If the electric field is constantly turning, the water molecules will follow and try to maintain a smooth formation with the electric field.

If the electric field turns very fast, then the water molecules turn quickly and heat up, and the temperature of the water rises.

Electromagnetic waves are equivalent to such a rotating electric field. The electromagnetic waves used in the microwave oven have to turn more than two billion laps per second. The water molecules are following this speed, and naturally they are "heated", and the temperature rises sharply in a short time.

Once the microwave stops, the rotating electric field disappears, the water molecules are quiet, and their world is restored. In this process, the water molecules themselves are not altered by the microwave.

Not only water, but other polar molecules can also be heated by commercial microwave ovens. Normal foods contain water and other polar molecules, so they can be heated quickly by commercial microwave ovens.

Non-polar molecules, such as air, and certain containers, will not be heated. We usually feel that the container is hot after the food is hot, and it is often "hot" by the high temperature food.

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