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A microwave oven or simply microwave is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range. [1] This induces polar molecules in the food to rotate and produce thermal energy (heat) in a process known as dielectric heating .
A microwave oven uses dielectric heating to cook food. Dielectric heating, also known as electronic heating, radio frequency heating, and high-frequency heating, is the process in which a radio frequency (RF) alternating electric field, or radio wave or microwave electromagnetic radiation heats a dielectric material.
A microwave oven passes microwave radiation at a frequency near 2.45 GHz (12 cm) through food, causing dielectric heating primarily by absorption of the energy in water. Microwave ovens became common kitchen appliances in Western countries in the late 1970s, following the development of less expensive cavity magnetrons. Water in the liquid ...
Ingredients: 8 oz (225g) lean ground beef. ½ cup (60g) onion, finely minced. 1 teaspoon garlic powder. ½ teaspoon black pepper. ½ teaspoon salt. ½ teaspoon dried thyme or oregano
Microwaves get a bad rap partially because, unlike a stove or an oven, people believe them to work in mysterious ways. But microwaves aren’t magic — just science. Microwave ovens operate by ...
The appliance, which relies on electromagnetic radiation to heat or cook food, is thought by some to be a kitchen staple. ... With so many split over whether or not a microwave oven is essential ...
In microwave cooking, susceptors are built into paper packaging of certain foods, where they absorb microwaves which penetrate the packaging.This process raises the susceptor patch temperature to levels where it may then heat food by conduction or by infrared radiation.
The waveguide directs the extracted RF energy to the load, which may be a cooking chamber in a microwave oven or a high-gain antenna in the case of radar. The size of the cavities determine the resonant frequency, and thereby the frequency of the emitted microwaves. However, the frequency is not precisely controllable.
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