Question

The diagram alongside shows the refraction of a ray of light from air to a liquid. Angle of refraction is:

• A. ${60}^o$
• B. ${15}^o$
• C. ${30}^o$
• D. ${45}^o$

Answer 1

The correct option is D ${45}^o$

Angle of refraction is the angle made between the refracted ray and the normal. The angle between the refracted ray and surface is ${45}^o$. Hence, angle between normal and refracted ray will be 90-45=${45}^o$