Because there are iron, aluminum, stainless steel, enamel and other utensils in the microwave oven, when it is heated, it will spark with the metal and reflect the microwave, which will not only damage the oven body, but also heat the immature food.

Microwave oven (microwave oven/microwave oven), as its name implies, is to use microwaves to cook and cook. Microwave oven is a modern cooking stove that uses microwaves to heat food. Microwave is an electromagnetic wave. The microwave oven consists of power supply, magnetron, control circuit and cooking cavity. The power supply provides a high voltage of about 4000 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 microwave in all directions after rotation, so the microwave energy can be evenly distributed in the cooking cavity. The power range of microwave oven is generally 500 ~ 1000 watt. Thereby heating the food.