Question

If a prism of angle $6^{\circ }$ deviates a ray through $3^{\circ }$, the refractive index of the material of prism is

• A. 1.62
• B. 1.33
• C. 1.5
• D. 1.72

Answer 1

The correct option is C 1.5

$D=(\mu -1)A{3}^{\circ }=(\mu -1)6^{\circ }=\frac{3}{2}\frac{1}{2}=\mu -1\mu =1.5$