[单选题]
99.26: A beam of light traveli4k m5m),,sbv nwke(h5c oo5 / iepda.wng in glk bv.,kzs8-y wass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?
