1. The problem statement, all variables and given/known data You shine a red (λ = 650 nm) laser beam and a green (λ = 532 nm) laser beam at a diffraction grating that has 400 slits/mm to create an interference pattern on a wall 2.30 m from the grating. If the two lasers are directly on top of each other, how far apart are the two m = 1 bright fringes from each other? 2. Relevant equations 3. The attempt at a solution (650*10^-9)(2.30) / (1/400)(.001) - (532*10^-9)(2.30) / (1/400)(.001) = 0.10856 m This is incorrect, however. What did I miss?