A ray of light passing through an equilateral triangular glass prism from air undergoes minimum deviation when angle of incidence is `(3)/(4) th` of the angle of prism. Calculate speed of light in prism.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Understand the Geometry of the Prism
The prism is an equilateral triangle, which means all angles are equal to 60 degrees. The angle of the prism (A) is therefore:
\[ A = 60^\circ \]

### Step 2: Determine the Angle of Incidence
According to the problem, the angle of incidence (I) is \( \frac{3}{4} \) of the angle of the prism. Therefore, we calculate:
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