Write the value of angle of reflection for a ray of light falling normally on a mirror.

Explanation

To determine the angle of reflection for a ray of light falling normally on a mirror, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Normal Incidence**:
- When light falls normally on a mirror, it means that the light ray is perpendicular to the surface of the mirror. In this case, the angle of incidence (i) is measured from the normal (the line perpendicular to the surface).

2. **Defining Angles**:
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