The Purpose of Mesh Grating on Microwave Oven Doors

The mesh grating on microwave oven doors serves as a Faraday cage, protecting users from harmful electromagnetic radiation. The holes in the mesh are too small for microwaves to pass through, allowing them to bounce back into the oven while visible light can penetrate. This design not only ensures safety but also enables the appliance to function properly by allowing microwaves to heat food through random bouncing. While microwaves emit non-ionizing radiation, which poses a relatively minor threat compared to other forms of radiation, there is no need for concern as the amount of radiation escaping a microwave oven is minimal.