In _______reflection, rays of light falling on different parts of the rough surface strike at different angles of incidence.

Options

A. Regular
B. Specular
C. Diffuse
D. None

Answer

To answer the question, we need to identify the type of reflection that occurs when rays of light strike a rough surface at different angles of incidence.

### Step-by-Step Solution:

1. **Understanding Reflection**: Reflection occurs when light rays bounce off a surface. There are two main types of reflection: regular (or specular) reflection and diffuse reflection.

2. **Identifying Surface Types**: A smooth surface, like a mirror, causes regular reflection where light rays reflect at the same angle they hit the surface. In contrast, a rough surface scatters light in many directions.

3. **Analyzing the Question**: The question specifies that rays of light falling on different parts of a rough surface strike at different angles of incidence. This indicates that the surface is not uniform and has irregularities.

4. **Defining the Type of Reflection**: When light rays hit a rough surface and reflect at various angles due to the surface's irregularities, this phenomenon is known as **diffuse reflection**.

5. **Final Answer**: Therefore, the correct term to fill in the blank in the question is **diffuse reflection**.