Bragg's Law

• Constructive interference only occurs for certain θ' s correlating to a (hkl ) plane, specifically when the path difference is equal to n wavelengths, as schematically shown in Figure 2.04.

Figure 2.04: Schematic of X-ray diffraction.

The typical set up of X-ray diffractometer geometry and its components are shown in Figure 2.05.

Figure 2.05: Diffractometer components and geometry.