Figure 8.14: Diffraction grating tutorial. (a) Draw six paths. originating at the slits, at an angle 92 such that the wave along each path travels two wavelengths farther than the next wave. Also draw dashed lines at right angles to the travel direction. (These connect the ?}(I.'UEBfT'{Ji-'LES.) Your picture should look much like Fig. 8.8. but with the waves traveling at a different angle. Use a ruler! (1)) Do the same for six paths at an angle 6'1 X? such that each wave travels one-half wavelength farther than the next wave. (c) (b) W'hich maximum (or minimum) in the diffraction pattern does the 9;; drawing represent? The 91;? drawing? d 2 W UI A Figure 8.8: Six slits in a diffraction grating. A set of waves is spreading out from each of the slits. Six specific wave paths to a distant screen are shown, leaving the slits at angle 01. (The screen is so far away that the paths appear parallel on this scale but they eventually converge.) The dotted lines are drawn perpendicular to the paths of the waves