Chapter 36, Problem 11Q

(a) Figure 36-34a shows the lines produced by diffraction gratings A and B using light of the same wavelength: the lines are of the same order and appear at the same angles θ. Which grating has the greater number of rulings? (b) Figure 36-34b shows lines of two orders produced by a single diffraction grating using light of two wavelengths, both in the red region of the spectrum. Which lines, the left pair or right pair, are in the order with greater m? Is the center of the diffraction pattern located to the left or to the right in (c) Fig. 36-34a and (d) Fig. 36-34b?

Figure 36-34 Question 11.