Laue equations a(cos w1-cos 1)=h a(cosΨ1-cosp1)=h b(cosΨ2-cosp2)=k2J c(cosΨ3-cosp3)=In Incident beam Sharp diffraction peaks can only be observed when all the three equations are satisfied simultaneously!
Laue equations Sharp diffraction peaks can only be observed when all the three equations are satisfied simultaneously!
Monochromatic and Bragg's law parallel incident beam (p.52 of textbook) 0,20-Bragg angles Incident wave front 2A=2dk sine-path difference 2△=nλ-constructive interference Reflected wavefront 0 (hkl) dnkl (hkl) 20 (1915) Braggs'law:nA=2dhkl sinehkl
Bragg’s law (p.52 of textbook) Monochromatic and parallel incident beam (1915)