Because of this movement of polar molecules in food and the interaction between adjacent molecules, a phenomenon similar to friction is produced, which makes the water temperature rise, so the temperature of food also rises.
Extended data:
Development history
During the Second World War (1945), Spencer, an American radar engineer, happened to find the chocolate bar in his pocket melted and sticky while doing radar experiments. He suspected that it was caused by his body temperature, and later he found the thermal effect of microwave in continuous experiments.
Using this thermal effect, the United States issued a 1 patent on microwave in 1945, and Raytheon Company of the United States developed the world's first 1 microwave oven in 1947. In the 1940s, microwave ovens were mainly used in industry and commerce.
After people's continuous improvement, the household microwave oven was born in western Europe in 1955, and began to enter the family in the 1960s. By the 1970s, the cost of microwave ovens had been declining due to the problems of radiation safety and convenient operation.
People's Network-How was the microwave oven invented?