As shown in the figure, X-ray diffraction pattern is obtained from a diatomic chain of atoms P and Q. The diffraction condition is given by \( a \cos \theta = n\lambda \), where \( n \) is the order of the diffraction peak. Here, \( a \) is the lattice constant and \( \lambda \) is the wavelength of the X-rays. Assume that atomic form factors and resolution of the instrument do not depend on \( \theta \). Then, the intensity of the diffraction peaks is
