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What does light do when it strikes a surface that is not smooth?
When light strikes a rough surface it reflects in essentially random directions.
Why does a mirror reflect light so well?
Because it has a shiny & smooth surface which helps to reflect the light... Take an example of tree. A tree have a rough surface due to which light can be reflect. So All of this depends on the smoothness of surface.. :-)
Is it true that diffuse reflection occurs when light is reflected in many directions from a rough surface such as a grassy area?
Yes.Yes.Yes.Yes.
What will be the effect of incident ray of light striking a rough surface compared to the same rays striking a smooth surface?
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.
What fraction of sunlight is reflected by a surface?
The answer varies from one surface to another. A highly polished mirror will reflect almost all whereas a rough black body will reflect very little.
