[单选题]
Monochromatic light of wavelength 500 nm is incident normally on a gr,z3*gh5z3g eld jgp fu2zg37kenj;4rating. qvf0 y2r9tfyud:-1y2,zqbp i If the thr1qfu, y9vq 2i2fy :bpd-zty0ird-order maximum of the diffraction pattern is observed at $32.0^{\circ}$, how many total number of maxima can be seen?
