[单选题]
Light of wavelength 610 nm is incident on a slit 0.2 r2wyii/x. ir)0 mm wi z65i+ swh3okgde and the diffraction pattern is pro gs5whi 3o6+zkduced on a screen that is 1.5 m from the slit. What is the width of the central maximum?
A. $0.34 \; cm$
B. $0.68 \; cm$
C. $0.92 \; cm$
D. $1.2 \; cm$
