A Narrow Slit Is Illuminated with Sodium Yellow Light of Wavelength

Multiple Choice

A narrow slit is illuminated with sodium yellow light of wavelength 589 nm.If the central maximum extends to $\pm$ 30.0 $\degree$ ,how wide is the slit?

A) 0.500 mm
B) 2.20*10 ^{- 6} m
C) 3.33 *10 ^{- 5} m
D) 1.18 $\mu$ m
E) 5.89 $\mu$ m