1. The problem statement, all variables and given/known data Two diffraction gratings are stuck together, both with vertically aligned slits. Grating A has S1 slits and B has S2 slits. What is the new equivalent grating that is the product of two of the diffraction gratings above? (s1>s2>>>1) 2. Relevant equations a. N* = 1/d 3. The attempt at a solution Assuming that there are ajacent slits in both - I tried to think of a way that it will make sense. If s1>s2 , s1 should be a multiple of s2, but I couldn't figure out a way to come to the new grating equivalent.