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

Multiple Choice

In a single-slit diffraction experiment, a beam of monochromatic light passes through a slit of width 11.0 μm. If the first order dark fringe of the resulting diffraction pattern is at an angle of 4.31°, what is the wavelength of light?

A) 827 nm
B) 301 nm
C) 602 nm
D) 402 nm
E) 201 nm