The sodium spectrum is dominated by the bright doublet known asthe Sodium D-lines at λ1=588.995 and λ2=589.5924 nanometers. Say,you've got a diffraction grating with 3900 grooves/cm. Find theangles corresponding to the maxima of λ1 and λ2 in the first order:° and ° Find the difference between these angles: °. Now do thesame for the second order: °, °, and °. Notice that the resolutionincreases with the order! In what maximum order can these lines beobserved?
