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 of finding the relationship between the angle of incidence (I), the angle of the prism (A), and the critical angle (Ic) when a ray of light is incident on a glass prism and suffers total internal reflection, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Geometry of the Prism**:
- Let the angle of the prism be \( A \).
- A ray of light is incident on the first face of the prism at an angle of incidence \( I \).
- The ray refracts into the prism and makes an angle \( R_1 \) with the normal at the first surface.
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