When Two Slits Are Replaced with Three Slits (With the Same

Multiple Choice

When two slits are replaced with three slits (with the same slit-to-slit spacing) , all of the following changes occur in the interference fringe pattern except

A) the angular separation between principal maxima and the adjacent points of minima is reduced.
B) it is no longer dark at the points where the two-slit minima were located.
C) the principal maxima are more closely spaced.
D) the principal maxima are brighter.