The principle behind the microwave is very simple – it's all about the atom. When you add energy to an atom or molecule, it vibrates. ... The device that converts electrical energy to microwaves – called the magnetron – sends microwaves into the oven cavity, where they bounce off the reflective inner surface.

How do microwaves work simple explanation?

Microwaves are produced inside the oven by an electron tube called a magnetron. The microwaves are reflected within the metal interior of the oven where they are absorbed by food. Microwaves cause water molecules in food to vibrate, producing heat that cooks the food.

How do microwaves use electromagnetic waves?

Microwave ovens use electromagnetic radiation to heat food. The non-ionizing radiation used by a microwave does not make the food radioactive. Microwaves are only produced when the oven is operating. The microwaves produced inside the oven are absorbed by food and produce the heat that cooks the food.