“…In that case, Equation () is rearranged to
3 :
where
is the deviation parameter for each i th minima fringe from the exact Bragg condition, which is the position of the fringe at the centre of the convergent diffraction disks for which the deviation parameter s = 0, and n i is an integer number which we arbitrarily assign to each fringe. By dividing with
on both sides and rearranging the Equation (), the following one is obtained
4,5,6,7,8,9,10,11,12,13 :
…”