1. The problem statement, all variables and given/known data A laser is used to illuminate a diffraction grating that has spacing of 637 lines per mm. The grating sits 11.6 cm in front of a screen. Find the distance to the first and second maxima (y1 and y2) for the laser wavelength of 643 nm. Express your answers in mm. 2. Relevant equations wavelength = (s/m)(ym/sqrt(L2+ym2)) 3. The attempt at a solution s = 1/637 = .00156 mm L = 116 mm wavelength = 643 X 10-6 mm I tried solving this equation for ym, but the answer I got was wrong. Is there another way to do this problem?