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- Fresnel Diffraction: Fresnel’s Assumptions. Fresnel’s Half-Period Zones for
Plane Wave. Explanation of Rectilinear Propagation of Light. Theory of a Zone Plate: Multiple Foci of a Zone Plate.
Fresnel’s Integral, Fresnel diffraction pattern of a straight edge, a slit.
- Fraunhofer Diffraction: Single slit. Circular aperture (solution may be
assumed), Resolving Power of a telescope. Double slit. Multiple slits. Diffraction grating. Resolving power of
grating. Rayleigh criterion for resolution.
- Typical transmission grating costs 150-200$ + shipping, roughly 15K INR. Typical replica grating in India costs