When you microwave food, you are essentially running AC through it, using the food as a dielectric material.
When you make toast in the microwave, the inside of the slice of bread will turn brown, while the outside stays white. (Careful timing is require; a few seconds too long and smoke will start oozing out of the bread's pores while it is still white.)
When you make toast in the microwave, the inside of the slice of bread will turn brown, while the outside stays white. (Careful timing is require; a few seconds too long and smoke will start oozing out of the bread's pores while it is still white.)