Light waves with two different wavelengths, 632 nanometers and 474 nanometers, pass simultaneously through a single slit whose width is 9.07 x 10-5 meter and strike a screen 1.70 meter from the slit. Two diffraction patterns are formed on the screen. Find what is the distance between the common center of the diffraction patterns and the first occurrence of the spot where a dark fringe from one pattern falls on top of a dark fringe from the other pattern?