When two grapes are placed in a microwave oven, they will explode when heated. The reason is that there is no way to release the heat and steam generated in the grapes, so the steam in the grapes will constantly want to come out, which will produce a strong squeezing force. When the ordinary skin can't bear this force, the grapes will explode. In fact, this is the same as heating chestnuts or eggs, and there will be explosions.

The principle of microwave oven microwave oven is different from ordinary oven. The heat generated by the oven is from the outside to the inside, so when the oven is heated, the outside of the food may be very hot, but the inside is still cold. However, microwave ovens convert electric energy into microwaves, and then use the energy generated by microwaves to heat food. Microwave can directly penetrate into the inside of food, so microwave ovens usually add the inside before heating the outside.

In the process of grape explosion, when grapes, a kind of food tightly wrapped by skin, are given, the microwave will first reach the inside of the food, so the inside of the grapes will generate huge heat, so the water in the grapes will evaporate and form water vapor, which will continue to penetrate. However, because the skin is wrapped, the grapes will swell, and the internal pressure will be great, until the skin can not bear this pressure, it will be broken, so the grapes will explode.

Taboos for using microwave ovens When using microwave ovens, it is best not to put airtight food directly in the microwave oven. For example, chestnuts should be opened in advance, and fruits should not be placed in the microwave oven as far as possible. As long as the water vapor in the food can be discharged, it will not easily explode. And the tableware used must not be made of metal, because metal can reflect microwaves, and food can never be heated. No matter how long it is placed in the microwave oven, food will never be cooked, and doing so may also lead to safety accidents.