A bunch of electrons running off of metal is called electricity, and we see it in the form of sparks. ![]() The reason why is that metals like to give away electrons, so when the microwaves "push" at their magnet-like electrons, instead of turning, they just give the electrons away. Metals tend to spark in microwaves, rather than heating. To heat the food evenly the microwave's turntable spins the food around. The microwaves of microwave ovens can heat foods containing polar molecules, such as water, as polar molecules are prone to the vibration effect caused by the microwaves. When we place the food inside the chamber and turn the timer switch on, it sends a command to the magnetron to send microwaves, as well as to the turn table to start turning. Īpart from this, the oven has a wave guide, turntable, and a timer switch. In an ordinary oven the energy stays mostly near the surface, so it takes more time. This also happens in a normal oven, but microwave energy goes deeper so that the food cooks much faster. As they heat up the heat goes to the inside of the food. This makes water molecules twist about 2.5 billion times a second. It makes very short radio waves which go into the food to a depth of about 2.5cm (one inch). The microwave oven uses a magnetron, which is a type of vacuum tube. On 8 October 1945, Raytheon filed a United States patent application for Spencer's microwave cooking process, and an oven that heated food using microwave energy from a magnetron was soon placed in a Boston restaurant for testing. Smart SLIM Over-the-Range Microwave with 400 CFM Hood Ventilation, Wi-Fi & Voice Control - Stainless steel Model: ME11A7510DS/AA SKU: 6469096 (185) 399.99 Was 476.99 LG - 2.0 Cu. When food was placed in the box with the microwave energy, the temperature of the food rose rapidly. Appliances Microwaves 170 items Sort By: Filters: On Sale Samsung - 1.1 cu. To prove his finding, Spencer created a high density electromagnetic field by feeding microwave power from a magnetron into a metal box from which it had no way to escape. And the second time, he cooked an egg, which exploded in the face of one of the experimenters. ![]() First, Spencer deliberately cooked popcorn with a microwave oven. Hired by Raytheon at the time, he noticed that microwaves from an active radar set he was working on started to melt a chocolate bar he had in his pocket. In 1945, the heating effect of a high-power microwave beam was accidentally discovered by Percy Spencer, an American self-taught engineer from Howland, Maine.
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