1. The problem statement, all variables and given/known data In a three-slit system, the first minimum occurs at an angular position of 5.00°. Where is the first maximum? 2. Relevant equations dsinθ = mλ/N 3. The attempt at a solution dsin5° = λ dsinX = λ/3 sinX = 3sin5° X = 1.66° I'm not sure if this is the right equation to find the first maximum in the interference pattern. Also, is the maximum the bright region and the minimum the dark region? Thanks all.