A ray of light is incident from a denser to a rarer medium. The critical angle for total internal reflection is θ iC and Brewster's angle of incidence is θ iB , such that sin θ iC sin θ iB = η = 1 . 28 . The relative refractive index of the two media is

Step-by-step solution

μ 1 : refractive index of rarer medium μ 2 : retractive index of denser medium sinθ C = μ 1 μ 2 tanθ B = μ 1 μ 2 sin θ C = tan θ B sin θ C sin θ B = tan θ B sin θ B = 1 cos θ B = 1.28 tan θ B = μ 1 μ 2 = 1 − ( 1 1.28 ) 2 ( 1 1.28 ) = 0.8