Microwave ovens heat food items by bathing them in electromagnetic waves, yet you can watch your food

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Microwave ovens heat food items by bathing them in electromagnetic waves, yet you can watch your food cook through a window in the door (Fig. Q23.4). How is it possible for the door, with only a thin layer of metal with a grid of holes, to contain the powerful electromagnetic radiation? 


330 Figure Q23.4 star Learning/ Charles D. Winters

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