Write a formula to express the relationship between refractive index of the denser medium with respect to rarer medium and its critical angle for that pair of media.

Explanation

To express the relationship between the refractive index of the denser medium with respect to the rarer medium and its critical angle, we can follow these steps:

### Step 1: Understand the Concept of Refractive Index
The refractive index (µ) of a medium is defined as the ratio of the speed of light in vacuum (c) to the speed of light in that medium (v). For two media, we denote the refractive index of the rarer medium as µ_A and that of the denser medium as µ_B.

### Step 2: Apply Snell's Law
Snell's Law states that:
\[
...