A microwave oven is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range.
For your reference, here is more information about the microwave oven:
1. Different from conventional heating, microwave heating is a kind of internal heating, that involves an energy conversion from electromagnetic energy to thermal energy rather than heat transfer;
2. The microwave oven has many advantages including quick and convenient, high thermal efficiency, energy saving and even heating.