You can cook in a microwave oven.

microwave oven (microwave oven/microwave oven), as its name implies, is a modern cooking stove that uses microwaves to heat food. Microwave is an electromagnetic wave. Microwave oven consists of power supply, magnetron, control circuit and cooking cavity. The power supply provides a high voltage of about 4 volts to the magnetron. Under the excitation of the power supply, the magnetron continuously generates microwaves, which are coupled into the cooking cavity through the waveguide system.

There is a rotatable agitator near the entrance of the cooking cavity. Because the agitator is a fan-shaped metal, it can reflect microwaves in all directions after rotating, so it can evenly distribute microwave energy in the cooking cavity, thus heating food.

Extended information:

Working principle of microwave oven

Microwave oven is a cooking appliance that uses food to absorb microwave energy in microwave field to heat itself. 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.

Generally speaking, microwave is a kind of high-frequency electromagnetic wave, which does not generate heat by itself. There are microwaves everywhere in the universe and nature, but there are microwaves in nature, so food cannot be heated because they are scattered and not concentrated. The microwave oven uses its internal magnetron to convert electric energy into microwave, which penetrates the food at an oscillation frequency of 245MHz. When the microwave is absorbed by the food, the polar molecules in the food are attracted to oscillate rapidly at a speed of 2.45 billion times per second. The macroscopic manifestation of this oscillation is that the food is heated.

reference: Baidu encyclopedia-microwave oven