How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other?

Explanation

To determine how many times a ray of light is reflected by two plane mirrors placed parallel and facing each other, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Setup**:
- We have two plane mirrors that are parallel to each other. This means they are positioned in such a way that they face each other directly.

2. **Incident Ray**:
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