1. The problem statement, all variables and given/known data Monochromatic light with wavelength 580nm passes through a single slit 2.20um wide and 1.80m from a screen. Find the distance between the first- and second-order dark fringes on the screen. 2. Relevant equations 3. The attempt at a solution y=n[tex]\lambda[/tex]L/2d y1=0.237237m y3=0.711818m delta y = 0.4745m This doesn't work-I think possible because there arn't two slits but I'm not sure of what to do if this is the case?? Thanks for any help.