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Electromagnetic radiation easy
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Microwaves are electromagnetic radiation waves that have a very short wavelength. These waves can be used in various ways, for example, radars, communication or heating.
In the 1940’s, during World War 2, a scientist called Percy Spencer was doing research with these microwaves. He then found out about how they are able to excite food molecules, causing food to heat up very quickly.
When first invented, microwave ovens weren’t meant to be kitchen appliances. They were named “Radaranges” and when they were firstly sold, they were still too large and too expensive for home use. Home-use microwave ovens only started being sold at around 1967. Now, a microwave oven is known to be a small appliance for kitchen use, which heats up food through radiation.
There are many important parts in the production process of a microwave. The oven is composed of electric motors, relays, control circuits, an oven cavity, a front-control panel and the cavity door.
The first step of the manufacturing process of a microwave oven is to build the cavity door. To do so, machines are used to press metal...
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