Light travels from air into glass as shown below.

The refractive index of the glass is

A. \(\frac{{\sin 30^\circ }}{{\sin 80^\circ }}\)

B. \(\frac{{\sin 80^\circ }}{{\sin 30^\circ }}\)

C. \(\frac{{\sin 60^\circ }}{{\sin 10^\circ }}\)

D. \(\frac{{\sin 10^\circ }}{{\sin 60^\circ }}\)

C