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A convex mirror is a curved mirror that reflects light in a different way than a flat mirror. The reflective surface bulges out toward the light source and is not used to focus light, but instead forms a virtual image as the focal point (F) and centre of curvature (2F).
A Convex Mirror’s Focal Length
A Convex mirror’s focal length is computed by multiplying the radius of curvature, R, by the formula f=R/2. The convex mirror’s focal length f is typically greater than the focal length of a flat mirror.
Magnification
Convex mirrors produce a magnification that is dependent on object distance and the size of the object. The resulting magnification will be either upright or inverted, depending on the object’s location.
Image Properties
The size and position of the reflected image can be determined from graphical ray tracing. The resulting image will be a virtual, upright, and smaller object that can be viewed from any location relative to the mirror.
Convex mirrors are often used to form side mirrors on vehicles to help drivers see a wider area. They also are used in microscopes, magnifying glasses, and eyeglasses. They are also used in cameras to provide a more realistic view of objects. The broader field of view produced by convex mirrors is also useful for viewing areas that would be too difficult to observe from a flat plane mirror.
