If I look through the microwave window I can see through, which means visible radiation can get out. We know also that there is a mesh on the microwave window which prevents microwave from coming out.
My question is how does this work? how come making stripes or mesh of metals can attenuate microwave radiation yet allow visible radiation?
Looks like an electrodynamics problem to me with periodic boundary conditions (because of the partitions on the microwave oven window). Is it discussed in any textbook?
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