[单选题]
Light of wavelength 2 xj,b oedrohjae*71qc,b +5 z610 nm is incident on a slit 0.20lco f.ej.el ./ mm wide and the diffraction pattern is produced on a screen that is 1.5 m from the slit. What is the width of tho .c./leef. jle central maximum?
A. $0.34 \; cm$
B. $0.68 \; cm$
C. $0.92 \; cm$
D. $1.2 \; cm$
