Question: A thin square-wave phase grating has a thickness that varies periodically (period L ) such that the phase of the transmitted light jumps between 0

A thin square-wave phase grating has a thickness that varies periodically (period L ) such that the phase of the transmitted light jumps between 0 radians and radians. (a) Find the diffraction efficiency of this grating for the first diffraction orders. (b) What value of yields the maximum diffraction efficiency, and what is the value of that maximum efficiency

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