Question

If critical angle for a material to air is ${30}^0$, the refractive index of the material will be.

• A. 1
• B. 1.5
• C. 2
• D. 2.5

Answer 1

Answer: (C)

2

As we know,

$\mu =\frac{1}{sinC}=\frac{1}{sin30}=2$