Question

The graph shows the variation of angle of deviation with the angle of incidence for a triangular prism. The refractive index of the prism is

• A. $\sqrt{\frac{3}{2}}$
• B. $\sqrt{3}$
• C. $\frac{2}{\sqrt{3}}$
• D. $\sqrt{2}$

Answer 1

The correct option is B $\sqrt{3}$

${\delta }_{min}={60}^{\circ }$
$delt{a}_{min}=2i-A$
$\Rightarrow {60}^{\circ }=2\left({60}^{\circ }\right)-A$
$A={60}^{\circ }$