A light way deviates by `30^(@)` (which is one third of the angle of incidence) when it gets refracted from vacumm to a medium. Find the refractive index of the medium.

Explanation

To solve the problem of finding the refractive index of a medium when a light ray deviates by 30 degrees (which is one third of the angle of incidence) while transitioning from a vacuum to that medium, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Given Information:**
- Angle of deviation (D) = 30 degrees
- Angle of incidence (I) = 3 * D = 3 * 30 degrees = 90 degrees

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