X-ray Diffraction Methods1. A particular crystal has a set of parallel layers at a d-spacing of 8.50 Å. At what angle does the X-ray beam have to be placed to obtain a diffraction peak using copper Karadiation (1.542 Å).2. (a) The first order diffraction peak occurs at 2? = 13.0o for a crystalline powder when the radiation is CuKa ? = 1.542 Å. What is the d-spacing for the set of planes giving rise to this peak? (b) Do the same calculation using MoKa radiation ? = 0.7101 Å but keep the angle the same. (c) Use the same d-spacing calculated in part (a). At what angle would the peak occur for this spacing if the radiation is MoKa? (d) Rationalize the results obtained in parts (b) and (c).