Calculate the speed of light in a medium whose critical angle is `30^@`.

Explanation

To calculate the speed of light in a medium whose critical angle is given as \(30^\circ\), we can follow these steps:

### Step 1: Understand the relationship between critical angle and refractive index
The critical angle (\(C\)) is related to the refractive index (\(\mu\)) of the medium by the formula:
\[ \sin C = \frac{1}{\mu} \]
where \(C\) is the critical angle.
...