MCQ
For an equilateral prism, it is observed that when a ray strikes grazingly at one face it emerges grazingly at the other. Its refractive index will be
- A$\sqrt 3$
- B$\frac{2}{\sqrt 3}$
- ✓$2$
- Ddata not sufficient
✓
Answer
Correct option: C.
$2$
c
$\mathrm{i}_{1}=\mathrm{i}_{2}=90^{\circ}, \mathrm{r}_{1}=\mathrm{r}_{2}=\frac{\mathrm{A}}{2}=30^{\circ}$
$\mathrm{i}_{1}=\mathrm{i}_{2}=90^{\circ}, \mathrm{r}_{1}=\mathrm{r}_{2}=\frac{\mathrm{A}}{2}=30^{\circ}$
$\mu=\frac{\sin \mathrm{i}_{1}}{\sin \mathrm{r}_{1}}=2$
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