A metal mesh to shield the microwave oven door, meet the grid can be less than the microwave wavelength, but in accordance with the principle of wave diffraction, this is not a metal mesh to shield the microwave oven door was diffraction on the grid can meet less than the microwave wavelength, but in accordance with the principle of wave diffraction, the diffraction conditions is not obvious yet? So whether the microwave can penetrate the glass door radiation...
The inner strength of the metal mesh is always zero, so the electromagnetic waves in the metal mesh will not leak out of the microwave oven.
Electromagnetic wave is a kind of electromagnetic field, and the net is in the electric field, and the free electrons will move in the direction of the electric field
The shielding of electromagnetic wave belongs to electrostatic shielding, which is different from "blocking" mechanical wave.
