Return to Fig. 12.8 and the broad, quasimonochromatic, long, rectangular source of light ( 0 = 500

Return to Fig. 12.8 and the broad, quasimonochromatic, long, rectangular source of light (λ̅₀ = 500 nm). How far apart should the two movable narrow aperture slits be if the fringe pattern on Σ_o is to disappear for the first time as that separation increases from near zero? The source is 1.0 m in front of the aperture screen, and the width of the source is 0.10 mm.