Diffraction

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### Lectures

• Lecture 0. [Invitation to Optics]
• Lecture 1. [Classification of Diffraction]
• Lecture 2. [Fresnel Diffraction]
• Lecture 3. [Zone Plate]
• Lecture 4. [Fresnel Diffraction Integral]
• Lecture 5. [Fraunhofer Diffraction]
• Lecture 6. [Double Slit]
• Lecture 7. [Transmission Grating]
• Lecture 8. [Dispersive & Resolving Power]

### Study Materials

1. Optics - Eugene Hecht.
2. Optics - A. Ghatak.
3. Waves: Berkeley Physics Course (Vol.3) - Francis Crawford.
4. Fundamentals of Optics - F.A. Jenkins and H.E. White.
5. Introduction to Optics - F.L. Pedrotti, L.S. Pedrotti, L.M. Pedrotti.
6. Principles of Optics - Max Born and Emil Wolf.
7. Fundamental of Optics - A. Kumar, H.R. Gulati and D.R. Khanna.
8. A textbook of Optics - N Subramanyam, B. Lal and M.N.Avadhanulu.
9. Principles of Optics - B.K.Mathur.

### Topics

1. 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.
2. 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.

### Remarks

• Typical transmission grating costs 150-200\$ + shipping, roughly 15K INR. Typical replica grating in India costs Rs.500/-.