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Why do microwave ovens have turntables?

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The answer is only partially correct. While it does serve to smooth out the influence of hot and cold spots to some extent, the glass turntable has another major function, namely to act as a “matching load”, i.e. read more

Microwave ovens have magnetrons producing microwaves. If these waves were let into the box cavity of the oven, they would form a standing wave pattern. This pattern is nothing but the incident and reflected microwaves interfering, creating spots of constructive and destructive interference - the 'hot' and 'cold' spots respectively. read more

Microwave ovens have a turntable because the microwaves themselves form what are known as 'standing waves'. This means there are essentially static columns of microwave energy inside the cabinet itself. read more

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GE MICROWAVE OVEN TURNTABLE
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