[单选题]
Light of wavelength 6109zhp ks:km4+e29zguinhd 5 s) nm is s i0w jc/rkggo-: pk),incident on a slit 0.20 mm wide and the diffraction pattern is produced on a screen that is 1.5 m from the slit. What i-j) kgogi:rk sw0/,c ps the width of the central maximum?
A. $0.34 \; cm$
B. $0.68 \; cm$
C. $0.92 \; cm$
D. $1.2 \; cm$
