What is called the point of incidence
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The place at which a ray or beam of light strikes a thing like a mirror then it is said to be point of incidence of the mirror.
For example -the ray entering in a dark room from the window is a ray of incidence
For example -the ray entering in a dark room from the window is a ray of incidence
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the angle of incidence is the angle between a ray incident on a surface and the line perpendicular to the surface of point of incidence
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