Hello everyone, I am new here to the physics forums. So for my first post I need some help on this problem from my homework. Here we go: A laser beam of wavelength 632.8 nm shines at normal incidence upon the reflective side of a compact disc. The tracks of tiny pits in which information is coded onto the CD are the 160 um apart. For what angle of reflection will the intensity of light be maximum? Any help is great appreciate, thank you.