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Why Diffraction?

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.

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Why Diffraction?

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  1. Why Diffraction?

  2. Exercise

  3. Superposition of Waves

  4. Questions

  5. Geometry of Diffraction: Braggs Law

  6. Geometry of Diffraction: Braggs Law

  7. Remarks on the Braggs Law

  8. Remarks on the Braggs Law

  9. 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)….

  10. Intensity of Diffraction

  11. X-ray Methods

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