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In depth-probe mode, BornAgain computes the refracted and transmitted beam intensity (squared amplitude) as a function of depth and incident angle. In this example, radiation with λ = 1 nm comes from vacuum (δ = 0) and enters at z = 0 a sample made of two layers on top of a substrate. Low-intensity bands show nodes of standing waves. An intensity maximum deep in the sample is found for αi ≃ 0.7°.
