A microwave oven is a kitchen appliance that cooks and reheats food quickly using invisible energy waves.

Here is the simple breakdown of how it works:
The Waves: The machine produces energy waves that bounce around the inside of the oven.
The Vibration: These waves pass right through plates and bowls, but they are absorbed by the water, fats, and sugars inside your food.
The Heat: The waves cause those water molecules to vibrate super fast. Just like rubbing your hands together, this rapid vibration creates friction, which heats the food up almost instantly.