How is the refractive index of a medium related to the speed of light ? Obtain an expression for refractive index of a medium with respect to another in terms of speed of light in these two media ?

Explanation

To find the relationship between the refractive index of a medium and the speed of light, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Speed of Light**:
The speed of light in vacuum (denoted as \( c \)) is a constant value, approximately \( 3 \times 10^8 \) meters per second.

2. **Defining Refractive Index**:
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