In a regular reflection, the incident parallel rays have ____.

Options

A. a large angle of incidence
B. a small angle of incidence
C. different angle of incidence
D. equal angle of incidence

Answer

To answer the question "In a regular reflection, the incident parallel rays have ____," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Regular Reflection**: Regular reflection occurs when light rays strike a smooth and polished surface, such as a plane mirror. This type of reflection allows for the clear and defined reflection of light.

2. **Identifying the Incident Rays**: In this scenario, we are considering incident rays that are parallel to each other. This means that the rays are coming in at the same angle and direction towards the reflective surface.

3. **Drawing the Normal Line**: For each incident ray, we can draw a normal line at the point where the ray strikes the surface. The normal line is perpendicular to the surface at that point.

4. **Angle of Incidence**: The angle of incidence is defined as the angle between the incident ray and the normal line. Since the rays are parallel, they will all have the same angle of incidence when they strike the surface.

5. **Conclusion**: Therefore, in regular reflection, the incident parallel rays have equal angles of incidence. This means that all the parallel rays will reflect off the surface at the same angle, maintaining their parallel nature after reflection.

### Final Answer:
In a regular reflection, the incident parallel rays have equal angles of incidence.

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