[单选题]
Light of wavelength 580 nm is incidentbq ;ebn1 ye.9a on a slit of widthr 0 v.ot)zijz-t:2sr v 0.300 mm. An observing screen is placed 2.00 m from the slit. Find the s-rv zt.i: 0)tvzr j2oposition of the first order dark fringe from the center of the screen.
A. $0.26 \; mm$
B. $1.9 \; mm$
C. $3.9 \; mm$
D. $7.7 \; mm$
