How Do Microwaves REALLY Work?

How Do Microwaves REALLY Work?

Welcome back to Creative Focus, today on the channel we are going to get to know How do microwaves work. Microwave ovens were life altering from the moment they began humming and heating in homes of the 1970s. The sprinter to the conventional oven’s cross-country runner, microwaves quickened the process of cooking and reheating meals, saving time and increasing the potential for leisure over work. The mechanics of the microwave were, from the very start, mysterious. It seems to be a magical metal box that spins and heats food by invisible means rather than heating the air and everything around it by conduction from a flame (as was the norm). Microwave users also came to accept the odd rules of the technology: no metal, no meltable plastics, and stir to cook evenly. So what is the magic behind the microwave?

Microwave ovens cook foods by injecting them with, surprise, microwaves—a form of energy. These electromagnetic waves are invisible to the human eye and fall between radio waves, which are longer in wavelength, and infrared waves, which are shorter. Inside the guts of a microwave, a device called a magnetron channels electrical energy from a power outlet to a heated filament, creating a flow of electrons that in turn transmits microwaves into the cooking chamber through an antenna. Microwaves bounce around in the chamber and cook food through radiation heating—exciting molecules within an object—by becoming lodged in water, sugars, and fats. Because the microwaves can travel only so far into an object before losing momentum, the outsides of thicker foods become heated by microwaves, and the insides are heated subsequently by the conductive transfer of heat from the outsides. Learn how microwaves work in this video.

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