MCQ
An achromatic prism is made by combining two prisms $p_1\left(\mu_v=1.523, \mu_r=1.515\right)$ and $p_2\left(\mu_v=1.666, \mu_r=1.650\right)$; where $\mu$ represents the refractive index. If the angle of the prism $p_1$ is $10^{\circ}$, then the angle of the prism $P _2$ will be
- ✓$5^{\circ}$
- B$7.8^{\circ}$
- C$10.6^{\circ}$
- D$20^{\circ}$
