Microwave oven
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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. This induces polar molecules in the f
A modern microwave oven (2022)
The cavity magnetron developed by John Randall and Harry Boot in 1940 at the University of Birmingham, England
Microwave ovens from the 1980s
Raytheon RadaRange aboard the NS Savannah nuclear-powered cargo ship, installed c. 1961
Dielectric heating
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Dielectric heating, also known as electronic heating, is the process in which a radio frequency alternating electric field, or radio wave or microwave electromagnetic radiation heats a dielectric mate
Microwave oven
…radiation in the microwave frequency range. This induces polar molecules in the food to rotate and produce thermal energy (heat) in a process known as dielectric heating. Microwave ovens heat food quickly and efficiently; the heating effect is fairly uniform in the outer 25–38 mm (1–1.5 inches) of a homogeneous…
A microwave oven uses dielectric heating to cook food.
In addition to heating food, microwaves are widely used for heating in many industrial processes. An industrial microwave tunnel oven for heating plastic parts prior to extrusion.