[单选题]
Lucite has an index of refraction of 1.50. Wha*r6.a rvc u;xptcjyy9f d1+3ht is its critical angle0o.d06pf5 ci lpjfsu/ )xnkq-7azzfjg o4r+ 8 of incidencz)/o 0zaf-8.jd7 r4pipn0q6 5 sljxfk f+gcoue?
A. $11.6^{\circ}$
B. $15.4^{\circ}$
C. $41.8^{\circ}$
D. $87.4^{\circ}$
