()maxmax11077 nmsin25.5435 nmddmθλλ===≈which indicates (on one side of the interference pattern) there are 25 bright fringes. Thus on the other side there are also 25 bright fringes. Including the one in the middle, then, means there are a total of 51 maxima in the interference pattern (assuming, as the problem remarks, that none of the interference maxima have been eliminated by diffraction minima). (c) Clearly, the maximum closest to the axis is the middle fringe at = 0°. (d) If we set m= 25 in Eq. 36-25, we find
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