A Parallel Beam of Monochromatic Light Is Incident on a Slit

Multiple Choice

A parallel beam of monochromatic light is incident on a slit of width 2 cm. The light passing through the slit falls on a screen 2 m away. As the slit width is decreased:

A) the width of the pattern on the screen continuously decreases
B) the width of the pattern on the screen at first decreases but then increases
C) the width of the pattern on the screen increases and then decreases
D) the width of the pattern on the screen remains the same
E) the pattern on the screen changes color going from red to blue