Angle of incidence is equal to the angle of reflection.

Options

A. Always
B. Sometimes
C. Under special conditions
D. Never

Explanation

To solve the question "Angle of incidence is equal to the angle of reflection," we need to understand the basic principles of reflection of light. Here’s a step-by-step solution:

### Step 1: Define the Terms
- **Angle of Incidence (i)**: This is the angle formed between the incident ray (the incoming ray of light) and the normal (an imaginary line perpendicular to the surface at the point of incidence).
- **Angle of Reflection (r)**: This is the angle formed between the reflected ray (the outgoing ray of light) and the normal.

### Step 2: Understand the Law of Reflection
According to the law of reflection, when light strikes a reflective surface (like a plane mirror), the angle of incidence is always equal to the angle of reflection. This can be mathematically expressed as:
\[ i = r \]

### Step 3: Visualize the Scenario
Imagine a plane mirror. When a light ray hits the mirror, it forms an angle with the normal line at the point of incidence. The light ray reflects off the mirror, forming another angle with the normal. According to the law of reflection, these two angles (the angle of incidence and the angle of reflection) are equal.

### Step 4: Conclusion
From the above understanding, we can conclude that the statement "Angle of incidence is equal to the angle of reflection" is true. Therefore, the correct answer to the question is:
- **Always**

### Final Answer
The angle of incidence is equal to the angle of reflection **always**.

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