The working principle is different: microwave ovens use microwave radiation to heat food. Microwave radiation is an electromagnetic wave, which can penetrate food and make the water molecules inside vibrate, thus generating heat. Microwave ovens use infrared rays to heat food. Infrared rays are light that can be absorbed by the surface of food and converted into heat. So the microwave oven mainly heats the whole food by heating the surface of the food.

The heating mode of microwave oven is more uniform, because it can heat food inside and outside. The heating mode of optical wave furnace mainly starts from the surface of food, and then heats the inside of food through heat conduction. Therefore, when heating some food, the surface of the microwave oven may be overcooked while the inside is still cold.

The microwave oven has the advantages of high heating speed, simple operation and wide application range; However, when heating some food, the surface of the microwave oven may be overcooked when it is still cold inside, and the price is slightly higher than that of the microwave oven.