Question

9) Monochromatic coherent light shines through a pair of slits. If the distance between these slits is decreased, which of the following statements are true of the resulting interference pattern? (There could be more than one correct choice.)

A) The distance between the maxima stays the same.

B) The distance between the maxima decreases.

C) The distance between the minima stays the same.

D) The distance between the minima increases.

E) The distance between the maxima increases.

Answer 1

apply Y = mLR/d

where d is slit width and Y is fringe width

so here if d decreses, Y increses

so correct answers are

D) The distance between the minima increases.

E) The distance between the maxima increases.