Usually when we cook eggs, the heat of fire is transferred to the water, and then to the eggs through the water, and the yolk will slowly solidify for a while. The air in the eggshell will expand when heated, and then it will be discharged through the fine holes in the eggshell in time, and at the same time, excess heat will be discharged into the water, so that the egg will be cooked.

Let's first understand the working principle of microwave oven. The electromagnetic tube in the microwave oven emits microwave, which is reflected back and forth in the microwave oven and absorbed by the food, causing the water molecules in the food to vibrate. Molecular vibrations rub against each other to generate heat, heating or cooking food. When an egg is heated by a microwave oven, a lot of heat will be generated in a short time in this closed space, which can't run out of the small holes on the surface of the egg at once, and the air in the eggshell will also expand, and the pressure inside the egg will increase, thus causing an explosion. Therefore, when food is heated in a closed container, the heat generated is not easy to dissipate, and the pressure in the container is too high, which is easy to cause accidents.

It is suggested that bottles, bags and bottled foods with lids or nipples should be opened and put into suitable containers, and then heated in the microwave oven. Microwave ovens generate high temperatures when they work, so containers that are not heat-resistant such as wood, bamboo and plastic are best not used in microwave ovens. Microwave ovens can choose special utensils made of heat-resistant glass and heat-resistant ceramics.