6} [It] points} light passes through a single slit and then hits a screen behind the slit. The Initial diffraction pattern on the screen is shown in the gure at the right. Then the slit width is changed (while all other quantities remain eonstant}, and the pattern on the screen changes to the Final pattern shown in the gure at the right. The dashed lines in the gure indicate the parts of the two patterns that are at identical positions on the screen. Detennine the nal slit width as a multiple ofthe initial slit width. As always, show your work clearly. An swer: H]: ?\"J F 105\"\"