Question

What is the value of refractive index of a medium?

• A. $\dfrac{\sin i}{\sin r}$
• B. $\dfrac{\sin r}{\sin i}$
• C. $\sin i + \sin r$
• D. $\sin i \times \sin r$

Hint:

Higher refractive index = light bends more towards normal.

Answer 1

The Correct Option is A

Step 1: Recall Snell’s law.
$n = \dfrac{\sin i}{\sin r}$, where $i =$ angle of incidence, $r =$ angle of refraction.
Step 2: Concept.
This ratio remains constant for a given pair of media.
Step 3: Conclusion.
Therefore, refractive index is $\dfrac{\sin i}{\sin r}$.