Do you think it is important for the mirrors to be placed at `45^@` to the vertical in a periscope? Why or why not?

Explanation

To determine whether it is important for the mirrors in a periscope to be placed at 45 degrees to the vertical, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Periscope Structure**:
- A periscope consists of two mirrors placed at opposite ends of a tube. The purpose of the periscope is to allow a person to see over or around an obstacle.

2. **Positioning of Mirrors**:
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