Why do microwave ovens have a rotating turntable for the food?

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Microwaves have ‘hot’ spots, and ‘cold’ spots. That is the reason for the rotation, to account for the uneven distribution of the waves that excite the water molecules to heat the food. If the food sat in one position, there would be areas that would be hot, and other areas that would be totally cold. May 9, 2014
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