The refractive index of the material of an equilateral prism is 1.5 . If a ray of light is incident

Question

The refractive index of the material of an equilateral prism is 1.5 . If a ray of light is incident at an angle $15^{\circ}$ on one side, then\

Professor PC Thomas Classes · Answer

$\mathrm{i}_{1}=15$\ $	herefore \mathrm{r}_{1}<15$\ $\mathrm{r}_{1}+\mathrm{r}_{2}=\mathrm{A}=60$\ $	herefore \mathrm{r}_{2}>45$\ Critical angle C of glass of $\mathrm{n}=1.5$ is about $42^{\circ}$. Here $\mathrm{r}_{2}>\mathrm{C} . 	herefore$ Total internal reflection will take place at the second face AC . So the ray will not emerge out of the prism.\