MCQ
A ray of light travelling in a transparent medium falls on a surface separating the medium from air at an angle of incidence of $45^{\circ}$. The ray undergoes total internal reflection. If $n$ is the refractive index of the medium with respect to air, select the possible value $(s)$ of $n$ from the following
- A$1.3$
- B$1.4$
- ✓$1.5$
- D$1.6$