A strontium vapor laser beam is reflected from the surface of a CD onto a wall. The brightest spot is the reflected beam at an angle equal to the angle of incidence. However, fringes are also observed. If the wall is 1.2 m from the CD, and the second bright fringe is 0.803 m from the central maximum, what is the spacing (in m) of grooves on the CD? (Assume a strontium vapor laser has a wavelength of 431 nm. Also assume that the main reflected beam incident on the wall is exactly perpendicular to the wall.)