The Intensity of the Single-Slit Diffraction Pattern at Any Angle

Multiple Choice

The intensity of the single-slit diffraction pattern at any angle θ is given by .For light of wavelength 480 nm falling on a slit of width 3.5 µm, what is the value of α when θ = 18°?

A) 0.31 rad
B) 2.3 rad
C) 7.1 rad
D) 7.3 rad
E) 9.8 rad