Magnetron

Magnetron

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Credit: Ted Kinsman/SCIENCE PHOTO LIBRARY

Caption: A magnetron removed from a microwave oven. The magnetron is a device that creates microwave radiation. A magnetron consists of an electron tube surrounded by a magnet. As electrons are released from the heated cathode they are forced to take a spiral path to the anode by the magnetic field, creating microwaves. This magnetron creates a microwave radiation that is the same frequency as a vibrating water molecule. When water is exposed to just the right frequency, the water molecules will gain kinetic energy and become hotter.

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Keywords: cathode, electrical, electrical engineering, electron, electronic, electronics, energy, exciting molecules, food preparation, household item, magnetic field, microwave, microwave oven, physics, radiation, radio waves, technology, vacuum chamber, vibration, voltage, waveguide, waves

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