Question

In which circumstances the refraction of a ray of light does not occur?

• A. When an angle of incidence is ${\theta }_1=0$
• B. When the refractive index of both the mediums are equal
• C. $\left(A\right)$ and $\left(B\right)$ both
• D. none of these

Answer 1

Answer: (C)

$\left(A\right)$ and $\left(B\right)$ both

When angle of incidence ${\theta }_1=0$ or the refractive indices of both media are equal the light ray doesn’t deviate. It follows the same path and hence refraction doesn’t occur.

Therefore the correct answer is option (C).