[单选题]
Monochromatic light of wa)fz*q8 5 q q,(m+d jcv5mwbicvvelength 500 nm is inc r03zz1sxe-kiident normally on a grating. If the third-order maxi0zkzei- xrs 13mum of the diffraction pattern is observed at $32.0^{\circ}$, how many total number of maxima can be seen?
