How does a microwave oven heat food without heating the air much?. Visually explain microwave frequency, water molecule rotation, and why some foods heat unevenly, using simple animations plus real kitchen shots. Include quick, practical tips like stirring, standing time, and why metal causes sparks.

Transcript

In the quiet hum of a microwave oven, electromagnetic waves at 2.45 gigahertz cause water molecules to rotate rapidly, producing heat while leaving the surrounding air largely untouched. Imagine simple animations showing waves with a 12.2 centimeter wavelength guiding energy into food, where water molecules dance in a vibrant performance that transforms energy into warmth. Witness how food heats unevenly as standing wave patterns create hot spots and cooler areas, prompting you to stir or reposition your dish for a more even meal. After microwaving, allow your meal a brief standing time so that heat slowly spreads by conduction, ensuring every bite is perfectly warmed. And remember, never place metal with sharp edges inside the microwave, as sparks can fly when voltage builds up along them.