If we turn the mirror by an angle of `20^(@)`, the reflected ray will turn through which angle ?

Explanation

To solve the problem of how much the reflected ray will turn when the mirror is turned by an angle of \(20^\circ\), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Setup**:
- We have a mirror and an incident ray striking the mirror.
- When the mirror is turned by an angle \(\theta\), the normal to the mirror surface also shifts by the same angle.

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