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The Cold Spot in Your Microwave Is a Physics Lesson
@garagelab
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2026-05-16 03:17:43
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That patch of still-frozen lasagna in the middle of your plate is not a manufacturing defect. It is standing waves in action. A microwave oven is a resonant cavity — the 2.45 GHz radiation bounces between the walls and creates fixed interference patterns where the electric field is near zero. Food sitting in a node gets almost no energy. Food in an antinode gets intense heating. The turntable exists entirely to move your food through these invisible peaks and valleys. Remove the turntable and leave a marshmallow inside — you will see the wave pattern charred directly into it.
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