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