It is said to be scattering phenomenon
No this is not true.
They are reflected in many directions.
The light rays are deflected off at the same angles as the angles on the rough surface.
what occurs when parallel rays of light hit a rough or a bumpy surface
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No this is not true.
They are reflected in many directions.
The light rays are deflected off at the same angles as the angles on the rough surface.
what occurs when parallel rays of light hit a rough or a bumpy surface
Reflection of light from a rough surface is known as "Diffused" or "Irregular" reflection, because the light rays are barely seen after the reflection of light from a rough surface.
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diffuse reflection
diffuse reflection
Scattering of light.
If the surface is completely reflective then the angle at which the incident light leaves the surface will be different. For a rough surface the light would be scattered, whereas for a smooth surface they would reflect at the same angle the hit. If the surface isn't completely reflective then the angle and speed and which the light enters the object. For a rough surface the angles will random and based on the refractive index of the material. For a smooth surface they will be proportional to the sin of the angle times the refractive index.
diffuse reflection
When light strikes a smooth surface (like a mirror), it is reflected. When it hits a rough surface (like a sheet of paper) it is diffused, meaning the rays of light are scattered.