Light is incident on a plane glass sheet at an angle of `70^@`. Find the refractive index of glass sheet if the reflected and refracted rays are perpendicular to each other.

Explanation

To solve the problem, we need to find the refractive index of a glass sheet when light is incident at an angle of \(70^\circ\) and the reflected and refracted rays are perpendicular to each other.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We have light incident on a glass sheet at an angle of \(70^\circ\).
- The reflected ray and the refracted ray are perpendicular to each other.

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