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A convex mirror is a type of spherical mirror in which the reflective surface bulges outwards. The reflecting surface of a convex mirror is usually silvered to reflect light, but it can also be made from other materials such as glass or plastic.
The shape and size of a convex mirror are important considerations for their use. They are available in a range of shapes and sizes, including round, rectangular, hemisphere and part hemisphere formats.
Rear view mirrors are one of the most common applications for a convex mirror and they offer a safer way to see your rear and side views while driving or biking. Convex mirrors can also be used in factories, warehouses and production areas to improve safety for employees by ensuring they can see approaching forklifts or other vehicles.
Image formation and properties:
As with concave mirrors, convex mirrors can produce virtual (rays haven't actually passed through the image; their extensions do), erect, diminished, upright and point size images. As the object approaches the mirror, its image becomes smaller and gets closer to the focal point, until it reaches the focus.
Principal Focus:
The principal focus in a convex mirror is a point on the principal axis that any incident ray travelling parallel to the principal axis will reflect or travel through when it is reflected from the surface of the mirror. The distance from the mirror's surface to this point is called the focal length and is denoted by f.
