It is small kitchen appliance that is used for heating and cooling the food. The food is heated by the microwave radiations which is passed through it. It was inverted by Percy Spencer, an American self -taught engineer from Holland, Maine. While he was experimenting on an active reader set, it came to his notice that the microwaves generated by the reader set melted the candy bar present in his pocket. He then realized that the microwaves can also cook food. So, he invented microwave oven for cooking and heating the food.
In microwave oven, the food item is exposed to the radiations of the microwave, in the EM spectrum. The Polar molecule dwelling inside the food particles rotates as the microwave radiation induces the molecules as well as it produces thermal energy. This leads to rapid motion of polarized water molecule in the food, they get pulled back and forth many a times in a span of one second. The rapid motion occurring between the water molecules produces friction, therefore heat is generated. Dielectric heating is the process by which the substances present in food such as water, absorbs the energy from microwaves.
In microwave oven, the food item is exposed to the radiations of the microwave, in the EM spectrum. The Polar molecule dwelling inside the food particles rotates as the microwave radiation induces the molecules as well as it produces thermal energy. This leads to rapid motion of polarized water molecule in the food, they get pulled back and forth many a times in a span of one second. The rapid motion occurring between the water molecules produces friction, therefore heat is generated. Dielectric heating is the process by which the substances present in food such as water, absorbs the energy from microwaves.
No comments:
Post a Comment