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esradw

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the wave travels normal to a thin plate made of N thin parallel layers of thickness d1,d2...dN and refractive indices n1,n2...nN, Ignore all the reflactions ,what is the complex ( which I thought transmittane is always real )transmittance of the plate ?

Each of layers having different d and n confuces me, I don't know how to find the matrix for each? M1.M2.M3...MN=M so that I can reach the answer.

Any help ?

thanks