It reflects randomly, termed by physics "irregular reflection" or "diffused reflection."
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When light strikes a smooth surface, it reflects uniformly in a single direction, resulting in a clear reflection. In contrast, when light strikes a rough surface, it scatters in multiple directions, resulting in diffuse reflection. This causes the light to be dispersed rather than producing a distinct reflection.
When light strikes rough objects, it gets scattered in multiple directions due to the uneven surface. This causes the reflected light to be diffused rather than reflecting in a singular direction like with a smooth surface. As a result, the rough object appears matte or non-shiny compared to a smooth object.
Diffuse reflection
No, light does not bounce off evenly rough surfaces. When light hits a rough surface, it reflects in many different directions due to the irregularities on the surface, leading to diffuse reflection. This is why rough surfaces appear to scatter light in various directions.
Diffuse reflection occurs when light strikes a rough surface like the one on the right. This type of reflection causes light to scatter in different directions, creating a matte appearance with no clear image reflection.