Dielectric Heating

A microwave oven or what is generally called microwave, is a kitchen appliance that cooks or heats food by dielectric heating. Microwaves are invisible waves like television waves. They are electro-magnetic waves similar to radio and television waves, infrared radiation, visible light or ultraviolet rays. They are the very same waves you use in your mobile phone’s Bluetooth or infrared connections. When you connect to the internet using the wireless USB broadband modem, you are actually using microwaves.

Microwaves can not be seen but can be converted to music and pictures. The shorter the wavelength, the greater the energy content of the microwaves. The energy in microwave is sufficient enough to cause water and fat molecules in organic substances, such as food, to rub against each other, producing heat. It’s an ultrasonic vibration. The microwaves vibrate 2.5 billion times per second.

The Cooking and Heating Principle of a Microwave Oven

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