[单选题]
Light of wavelength 6f,exkj*r3b e0knf- i,10 nm is ia2g34w1;a6o be(9bv uo hafupncident on a slit 0.20 mm wide and the diffraction pattern is produced on a screen that is vu e2a4o3u a f9;(waphb6 o1gb1.5 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. $1.2 \; cm$
