Question

Two equilateral-triangular prisms $P_1$and $P_2$ are kept with their sides parallel to each other, in vacuum, as shown in the figure. A light ray enters prism $P_1$ at an angle of incidence 𝜃 such that the outgoing ray undergoes minimum deviation in prism $P_2$. If the respective refractive indices of $P_1$ and$P_2$ are $√ 3 /2$ and $√3$, then $\theta = sin{−1}[\sqrt \frac{ 3}{ 2} sin ( \frac{\pi}{B} )],$ where the value of $\beta$ is ______.

Answer 1

The correct answer is :12