The holes in the bottom of a microwave oven's glass turntable tray serve two primary purposes:
Even Cooking: Microwave ovens work by emitting electromagnetic waves that excite water molecules in food, causing them to vibrate and generate heat. The rotating turntable helps distribute the microwave energy evenly throughout the food. The holes in the turntable allow the microwaves to pass through to reach the food from below, ensuring more uniform cooking and heating.
Reduced Weight and Safety: The holes in the turntable also help reduce the overall weight of the glass tray. This makes it easier for the turntable motor to rotate the tray, ensuring smoother and more reliable operation. Additionally, the holes help prevent suction between the turntable and the microwave cavity, making it easier to remove the tray for cleaning or other purposes.
The combination of the rotating turntable and the holes in the glass tray contributes to improved cooking performance, ensuring that your food is heated more evenly and efficiently inside the microwave oven.