A ray of light is incident on a glass prism of refractive index `mu` and refractive angle A. If it just suffers total internal reflection at the other face, obtain an expression relating the angle of incidence , angle of prism and critical angle.

Explanation

To solve the problem, we need to derive an expression relating the angle of incidence (I), the angle of the prism (A), and the critical angle (C) when a ray of light undergoes total internal reflection at the second face of a glass prism.

### Step-by-Step Solution:

1. **Understanding the Geometry of the Prism**:
- Consider a glass prism with a refractive index \( \mu \) and a refracting angle \( A \).
- A ray of light is incident on the first face of the prism at an angle \( I \).

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