Why Diffraction?

Dec 17, 2024

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Learn about diffraction, Bragg's Law, atomic arrangements affecting diffraction, cubic structure selection rules, and intensity of X-ray diffraction methods. Explore the superposition of waves in diffraction geometry and equations.

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Why Diffraction?

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Presentation Transcript

Why Diffraction?
Exercise
Superposition of Waves
Questions
Geometry of Diffraction: Braggs Law
Geometry of Diffraction: Braggs Law
Remarks on the Braggs Law
Remarks on the Braggs Law
There are particular atomic arrangements which reduce the intensities of some diffracted beams to zero. There is no diffraction from the prediction. The selection rule for cubic structure:Diffraction Equation:r d=l d=a/(h2+k2+l2)1/2r1d1= r2d2= r3d3= …….r12:r22:r32:…..= 1/d1: 1/d2:1/d3 =(h12+k12+1l2):(h22+k22+122):(h32+k32+132)….
Intensity of Diffraction
X-ray Methods

Chapter 38

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$Waves: Diffraction$

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