A beam of light propagating in air with n = 1 makes an angle with the normal of 45° as it enters a flat horizontal boundary with a clear dielectric having an unknown index of refraction n₁. The refracted beam makes an angle of 30° with the normal. What is the value of no? (A) 1 (B) √2 (C) √3 (D) 2 (E) Suitable answer absent