Please solve the following numerical ,,.

Solution :

∠i = 60°
∠r = 32.7° 
According to Snell's law 
μ = sin i/sin r
μ = sin 60°/sin 32.7° 
μ = 0.86/0.54
μ = 1.59
Hence, Refractive index of the glass is 1.59