In a Single-Slit Diffraction Experiment, a Beam of Monochromatic Light

Multiple Choice

In a single-slit diffraction experiment, a beam of monochromatic light of wavelength 630 nm is incident on a slit of width 0.400 mm. If the distance between the slit and the screen is 1.80 m, what are the positions of the first dark fringes?

A) 0.440 × 10^-3 m
B) 0.870 × 10^-3 m
C) 1.30 × 10^-3 m
D) 1.65 × 10^-3 m
E) 2.84 × 10^-3 m