Aglass plate whose index of refraction is 1.66 is immersed in a liquid. the surface of the glass is inclined at an angle of 44º with the vertical. a horizontal ray in the glass is incident on the interface. when the liquid is a certain alcohol, the incident ray arrives at the interface at the critical angle. the index of refraction of the alcohol is closest to: o a. 1.13 ob. 1.17 o c. 1.15 o d. 1.11