Why are there "hot spots" and "cold spots" in a microwave oven?
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Microwaves reflect from the metal walls, creating stationary waves. At antinodes, the field is strong (hot spots); at nodes, it is weak (cold spots). The turntable rotates the food to even out heating…
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Full Explanation
Microwaves reflect from the metal walls, creating stationary waves. At antinodes, the field is strong (hot spots); at nodes, it is weak (cold spots). The turntable rotates the food to even out heating.