The figure is a graph of intensity versus angular position ̘ for the diffraction of an x-ray beam by a crystal. It implies that the scattering intensity has two maxima, at 0.75° and 1.15° incidence angles. The beam consists of two wavelengths, and the spacing between the reflecting planes is 0.95 nm. What are the (a) shorter and (b) longer wavelengths in the beam?