In the figure, first-order reflection from the reflection planes shown occurs when an x-ray beam of wavelength 1.22 nm makes a 0= 62.3 with the top face of the crystal. What is the unit cell size ao? X rays do Number i Units V e Textbook and MediaCurrent Attempt in Progress A diffraction grating 29.4 mm wide has 5170 rulings. Light of wavelength 828 nm is incident perpendicularly on the grating. What are the (a) largest, (b) second largest, and (c) third largest values of 9 at which maxima appear on a distant viewing screen? (a) Number n Units v (b) Number n Units V (c) Number n Units v eTextbook and Media Current Attempt in Progress A diffraction grating is made up of slits of width 280 nm with separation 590 nm. The grating is illuminated by monochromatic plane waves of wavelength A = 360 nm at normal incidence. (a) How many maxima are there in the full diffraction pattern? (b) What is the angular width of a spectral line observed in the rst order if the grating has 880 slits? (a) Number n Units v (b) Number n Units v