Hey, another question I'm working on. How many dark fringes will be produced on either side of the central maximum if light, (651nm) is incident on a single slit that is 5.47 x 10^-m wide? Ok, I figure I could use this forumula sin@= m x lambda/Width. Am I trying to locate the maximum m (the order of the dark fringe) that it'll go? I tried solving for m=1 and got a angle of 6.83 degrees. Now where to? Any tips/hints welcome. Thanks.