c) Reflection by a plane, polished surface is_________
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Regular reflection takes place when light is incident on smooth, polished and regular surfaces. ... The angle of incidence is equal to the angle of reflection. Incident ray, reflected ray and the normal drawn at the point of incidence to the reflecting surface, lie in the same plane.
A plane mirror which is a highly polished surface reflects the light on it. This is the regular reflection. However,irregular surfaces also do the same and it is called irregular reflection.
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Regular reflection takes place from a smooth or a regular surface. In regular reflection, all reflected rays are parallel to each other for parallel incident rays. Irregular or diffused reflection takes place from an irregular surface.
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