[单选题]
350 nm of light falls on a single s2n tfftr *2 6-gwhx;prl9j// lairfu+lit of width 0.20 mm. What is the angular 53nu7/0zfxp8 w4 vf* gj nfujcxi:h )ywidth of the central diffraction peapfug jx7zw yfi) 4v/08xn:fh j* ncu35k?
A. $0.10^{\circ}$
B. $0.15^{\circ}$
C. $0.20^{\circ}$
D. $0.30^{\circ}$
