Why disc in microwave oven rotates at slow speed?

The disc in a microwave oven rotates slowly to ensure even distribution of heat to the food. Microwaves are a type of electromagnetic radiation that can be absorbed by certain molecules, such as water molecules, and converted into heat energy. When food is placed in a microwave oven, the microwaves penetrate the food and cause the water molecules in the food to vibrate and generate heat.

Due to the uneven distribution of microwaves within the microwave oven cavity, the food can cook unevenly if the disc didn't rotate. Some areas of the food may receive more microwaves than others, resulting in uneven heating. By slowly rotating the disc, the food is continuously exposed to different parts of the microwave field, ensuring that it is heated evenly throughout.

The slow speed of rotation is important because it allows the food to be heated gradually and prevents it from being overcooked. If the disc rotated too quickly, the food would not be heated evenly and could be damaged by the microwaves. Additionally, the slow speed helps to maintain the shape and texture of the food, preventing it from becoming mushy or tough.

Overall, the slow rotation of the disc in a microwave oven is essential for ensuring even distribution of heat, preventing overcooking, and maintaining the quality of the food.