A Glass Plate Whose Index of Refraction Is 1

Multiple Choice

A glass plate whose index of refraction is 1.66 is immersed in a liquid.The surface of the glass is inclined at an angle of 44° 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:

A) 1.15
B) 1.13
C) 1.11
D) 1.09
E) 1.17