For destructive interference \(d\sin\theta _{dark}=(m+1/2)\lambda\) where \(m=0,\pm 1,\pm 2,\pm 3\ldots\) In both cases \(d\) is the distance between the center of the openings (the separation of the ...For destructive interference \(d\sin\theta _{dark}=(m+1/2)\lambda\) where \(m=0,\pm 1,\pm 2,\pm 3\ldots\) In both cases \(d\) is the distance between the center of the openings (the separation of the sources), the angle \(\theta\) is the angle from the central maximum out to a minimum or maximum and \(m\) numbers the maximums (or minimums) starting from the center (\(m=0\)).
