Part A Coherent light with wavelength of 680 nm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of For what wavelength of light will the first-order dark fringe be observed at this same point on the screen? 3.00 m from the slits. The first-order bright fringe is Express your answer with the appropriate units. at 4.80 mm from the center of the central bright fringe. 0 ( ] ? 1 = Value Units Submit Request