Question

Refraction occurs due to:

• A. Change in direction of light
• B. Change in speed of light
• C. Change in quality of light
• D. All

Answer 1

The correct option is D All

Refraction occurs due to change in optical properties of the light which causes change in direction and speed of light.

The light bends towards the normal or away from the normal if the refracting medium is denser or rarer respectively. The extent of bending is governed by Snell's law: $\frac{n_i}{n_r}=\frac{sin{\theta }_r}{sin{\theta }_i}$

The light slows down in a denser medium and becomes faster in a rarer medium.