When Light Is Totally Polarized by Reflection at an Interface $n_{1}$

Multiple Choice

When light is totally polarized by reflection at an interface between two materials where the index of refraction for the incident medium is $n_{1}$ and for the other is $n_{2}$ , the incident angle is given by $\theta=\tan ^{-1}\left(n_{2} / n_{1}\right)$ . This equation holds

A) only when $n_{2}<n_{1}+1$ .
B) only when $n_{2}>n_{1}$ .
C) for all values of $n_{1}$ and $n_{2}$ .
D) only when $n_{2}>n_{1}+1$ .
E) only when $n_{1}>n_{2}$ .