यदि कोई किरण किसी दर्पण पर `30^(@)` पर आपतित होती है तो परावर्तित कोण का मान होगा

Options

A. `40^(@)`
B. `60^(@)`
C. `30^(@)`
D. `90^(@)`

Answer

**Step-by-Step Solution:**

1. **Understand the Problem**: We are given that a ray of light strikes a mirror at an angle of incidence (θi) of 30 degrees. We need to find the angle of reflection (θr).

2. **Recall the Law of Reflection**: According to the law of reflection, the angle of incidence is always equal to the angle of reflection. This can be expressed mathematically as:
\[ θi = θr \]

3. **Substitute the Given Value**: Since we know that the angle of incidence (θi) is 30 degrees, we can substitute this value into the equation:
\[ θr = θi = 30^\circ \]

4. **Conclusion**: Therefore, the angle of reflection (θr) is also 30 degrees.

**Final Answer**: The angle of reflection is 30 degrees.

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