Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35. The slab is then immersed in a pool of liquid.

Light in a vacuum is incident on a transparent glass slab. The angle of incidence is 35.0° . The slab is then immersed in a pool of liquid. When the angle of incidence for the light striking the slab is 24.0°, the angle of refraction for the light entering the slab is the same as when the slab was in a vacuum. What is the index of refraction of the liquid?