Set 17 Problem 5 light? Light of wavelength 712 nm passes through two narrow slits 0.531 mm apart. The screen is 1.68 m away. A second source of unknown wavelength produces its second-order fringe 0.9 mm closer to the central maximum than the 712 nm light. What is the wavelength A of the unknown 5 7 A = nm ab sin(x Ox10 Submit Reset Reset All One might start by finding the position of the second-order fringe from the first source