The Bragg Equation can be used for determining the lattice parameter of cubic crystals. Bragg divided an apparatus known s X-Ray Crystal Spectrometer.
X-Rays from X-Ray tube passes through two narrow slits S_1 S_2 and strikes the single crystal mounted on the turn table. The intensity of reflected X-Ray is measured at the different ngle using ionization chamber. The Bragg angle it is possible to determine the interplanner spacing of a crystal from which the crystal lattice type can be reduced.
Let us consider ...