Question

How many laws of refraction of light are there?

• A. 1
• B. 2
• C. 3
• D. 4

Hint:

Snell’s law is key to calculating refractive index.

Answer 1

The Correct Option is B

Step 1: Definition.
Refraction is bending of light when it passes from one medium to another.
Step 2: Laws.
1. Incident ray, refracted ray and normal lie in the same plane.
2. Snell’s law: $\dfrac{\sin i}{\sin r} = \mu$, a constant for given media.
Step 3: Conclusion.
Thus, there are 2 laws.