When the microwave is absorbed by food, polar molecules (such as water, fat, protein, sugar, etc.) in food are attracted to oscillate at a speed of 2.45 billion times per second. The macroscopic manifestation of this oscillation is that the food is heated.

Working principle:

The microwave generated by the microwave generator in the microwave oven establishes a microwave electric field in the microwave oven cavity, and certain measures are taken to make this microwave electric field distributed as evenly as possible in the oven cavity. Food is put into this microwave electric field, and the cooking time and microwave electric field intensity are controlled by the control center to carry out various cooking processes.

It does not generate heat itself, and there are microwaves everywhere in the universe and nature, but there are microwaves in nature, so it is impossible to heat food because they are not concentrated. Microwave oven uses its internal magnetron to convert electric energy into microwave.