Derive the conditions for additional minima in case of 4 slits. Sketch the resulted intensity distribution on a figure. ad L Distances a between the principal maxima for different slit numbers N N=4, a, mm the order 1 3.6 2 7.5 3 11.3 7.46 = 0.00125mm L= 150cm 1500mm- distance from the double slit to the screen.