What do you mean by angle of prism ?

Explanation

To understand the concept of the angle of a prism, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Definition of a Prism**:
A prism is a transparent optical element with flat, polished surfaces that refract light. The most common type of prism is a triangular prism.

2. **Understanding the Structure**:
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