X is a rough surface.

Definition of a rough surface:
A rough surface refers to a surface that has irregularities, bumps, or unevenness. It does not have a smooth and even texture.

Explanation:
When light falls on a surface, it undergoes two types of reflection: specular reflection and diffuse reflection. Specular reflection occurs when light rays bounce off a smooth surface in a regular and predictable manner, resulting in clear images. On the other hand, diffuse reflection occurs when light rays bounce off a rough surface in various directions, causing the light to scatter and resulting in blurry or unclear images.

Reasons why a rough surface cannot produce clear images:
1. Diffuse reflection: When light strikes a rough surface, it does not reflect uniformly in a single direction. Instead, it scatters in multiple directions due to the irregularities on the surface. This scattering of light leads to a loss of focus and clarity, making it difficult to obtain clear images.

2. Light absorption: Rough surfaces often have small crevices, pits, or irregularities that can trap or absorb light. When light is absorbed rather than reflected, it further contributes to the blurriness or lack of clarity in the images formed.

3. Multiple reflections: The irregularities on a rough surface cause light to bounce off at different angles and undergo multiple reflections. These multiple reflections can interfere with each other, leading to distortion and blurring of the image.

4. Scattering of light: The irregularities on a rough surface cause the light to scatter in different directions. This scattering of light results in a loss of contrast and sharpness, making it challenging to perceive clear details in the image.

Therefore, a rough surface cannot produce clear images due to the diffuse reflection, light absorption, multiple reflections, and scattering of light caused by its irregularities.