Which type of surface causes diffused reflection?

Options

A. Reflective surface
B. Opaque surface
C. Rough surface
D. Smooth surface

Answer

### Step-by-Step Solution:

1. **Understanding Reflection**:
- Reflection is the bouncing back of light when it hits a surface. There are two main types of reflection: regular (or specular) reflection and diffused reflection.

2. **Defining Diffused Reflection**:
- Diffused reflection occurs when light rays strike a surface and scatter in many different directions. This scattering happens because the surface is not smooth.

3. **Identifying Surface Types**:
- Surfaces can be classified as smooth or rough. Smooth surfaces, like mirrors, cause regular reflection, where light rays reflect at specific angles. Rough surfaces, however, cause diffused reflection.

4. **Characteristics of Rough Surfaces**:
- A rough surface has irregularities and uneven textures. When light hits such a surface, the incident rays are reflected at various angles due to these irregularities.

5. **Conclusion**:
- Therefore, the type of surface that causes diffused reflection is a **rough surface**.

### Final Answer:
The type of surface that causes diffused reflection is a **rough surface**.

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