define concave convex plain mirror
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A curved mirror is a mirror with a curved reflecting surface. The surface may be either convex (bulging outward) or concave (recessed inward). ... Distorting mirrors are used for entertainment. They have convex and concave regions that produce deliberately distorted images.
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Concave mirror :- A hollow sphere is cut into parts and the outer surface of the cut part is painted. Then it becomes a mirror with its inner surface as the reflecting surface This kind of mirror is known as concave mirror. It is also called converging mirror
Convex mirror :- The other cut part of the hollow sphere is painted from inside, then its outer surface becomes the reflecting surface. This kind of mirror is known as convex mirror. It is also called diverging mirror
Plane mirror :- A plane mirror is simply a mirror with a flat surface. It’s not got a curved surface like a convex mirror or a concave mirror.