A ray of light falls perpendicular to face AB of a prism whose cross section is an isosceles rectangle. The ray follows the path shown in the figure. About the refractive index of the prism material it is correct to state that necessarily: a) n = 1,2 b) n > 1,2 c) n < 1.2 d) n = root of 2 e) n > the root of 2 f) n < root of 2 g) n = 1.6 h) n > 1.6 i) n < 1.6 j) n = root of 3 k) n > root of 3 1) n < root of 3 m) n = 2.0 n) n > 2.0 o) n < 2.0 A C B []