5. (a) Consider a crystal consisting of m + [ lattice planes of spacing d, of total thickness t = md_ being set for diffraction as depicted in Fig. 2. At the incidence angle &z, Braggs law 1s satisfied. Explain the phenomenon through which the angles 6; and 6; are the limiting angles at which the diffracted intensity falls to zero. ! (b) Assuming a triangular shape for the diffraction peak, derive the Scherrer Equation A " B cos Bz Where B is the Full Width Half Maximum of the triangular shaped diffraction peak