What is angle of prism ? What is its value in an equilateral prism ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Prism**: A prism is a transparent optical element with flat, polished surfaces that refract light. The angle of the prism is defined as the angle between the two plane surfaces of the prism.

2. **Types of Prisms**: Prisms can have various shapes, but in this case, we are focusing on an equilateral prism. An equilateral prism has three equal sides and three equal angles.

3. **Identifying Angles in an Equilateral Prism**: In an equilateral prism, since all three sides are equal, all three angles will also be equal. Let's denote each angle as \(A\).

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