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