A child in oven mitts looks from a steaming bowl to its plain ceramic dish beside an open microwave. something needs explaining

What does a microwave actually heat?

Soup may steam while its dish began cool. Yet some dishes warm too. What is the wave actually grabbing?

Cutaway view of the closed oven. Water is one common polar molecule, and dissolved ions can move. Other ingredients may respond weakly or strongly too.

A cutaway view through the closed microwave door shows magenta waves transferring energy into food, while the child watches outside.

Tap the field. The lopsided molecules turn, collide, and share energy with neighbors.

Change the responsive fraction in one anonymous sample. Its material makeup—not the dish name—controls where field energy lands.

Tap time forward. First the food gains energy; later heat crosses into the touching dish.

One pancake, same thickness and wave field. Its left half is moist; its right half is dry.

One pancake has a moist half and a dry half.

Where does the microwave deposit more energy first?