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Imagine that parallel rays are incident on an irregular surface. Remember that the laws of reflection are valid at each point of the surface. Use these laws to construct reflected rays at various points. Are they parallel to one another? You will find that these rays are reflected in different directions.
Parallel rays incident on an irregular surface
Rays reflected from irregular surface
It is noticed that the reflected rays are to each other due to irregularities in the reflecting surface. This type of reflection is known as reflection.
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