[单选题]
13.27: Light of wavelength 600nm is transmitte esuilef96 3wj/bt/5pd from air into a piexu0*b l s2ojl i9vnz8;awk nybc/9s q:rz3+,ece of glass. Which one of the labeled arrows best ina9,e8w9nrb/c n2bxzo:s+ 0; k3lulsvi*j yzqdicates the path of the light ray after it enters the glass?