A Two-Slit Arrangement with 60 $491.0 \mathrm {~nm}$ Coherent Light

Multiple Choice

A two-slit arrangement with 60.3 μm separation between the slits is illuminated with $491.0 \mathrm {~nm}$ coherent light. If a viewing screen is located 2.14 m from the slits, find the distance from the first dark fringe on one side of the central maximum to the second dark fringe on the other side.

A) 52.3 mm
B) 34.9 mm
C) 69.7 mm
D) 24.6 mm