Question

1) What are Fresnel's half period zone? And what are amplitude to a zone?
2) What is a zone plate?
3) Explain how a zone plate that has multiple foci compares the zone plate with convex lens.
4) Derive the necessary theory Fresnel's Diffraction due to a straight edge.
5) Discuss Fresnel's Diffraction at a narrow circular apperture.​

Answer 1

Answer:

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