Critical angle of glass is θ1 and that of water is θ2. What is the critical angle for water and glass surface ? (μg = 3/2, μw = 4/3).

less than θ2 between θ1 and θ2 greater than θ2 less than θ1

greater than θ2

Find refractive index for water and glass interface then refractive index equals the inverse of sine of critical angle.