[单选题]
Light of wavelength 610 nm is incident o(y0br( u3rg mqxm.xs1n a slit 0.20 mm wide and th5 y f0 c2:.wxy+kmr*7akrdsvb e diffraction pattk k2yd :xrsc0f v+bmy .a5*rw7ern is produced 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. $1.2 \; cm$
