A Young's Double-Slit Apparatus Is Set Up Where a Screen

A Young's double-slit apparatus is set up where a screen is positioned 0.80 m from the double slits. If the distance between alternating bright fringes is 0.83 cm, and the light source has a wavelength of 580 nm, what is the separation of the double slits? (1 nm = 10 ^{- 9} m)

A) 6.0 *10 ^{- 5} m
B) 2.8 *10 ^{- 5} m
C) 4.9 *10 ^{- 5} m
D) 5.6 *10 ^{- 5} m