According to the Snell's law if an electromagnetic wave is incident in a medium (refractive index n₁) on another medium (refractive index n₂);

A. The angle of incidence is equal to the angle of refraction

B. The angle of refraction ($$\theta {\text{r}}$$) is given by $$\sin {\theta _2} = \frac{{{{\text{n}}_1}}}{{{{\text{n}}_2}}}\sin {\theta _{\text{i}}}$$

C. Both (A) and (B)

D. Neither (A) nor (B)

Answer: Option B