A convex mirror is a curved mirror that bulges outward, away from the observer. It has a reflective surface that curves outward in all directions, causing light rays that strike it to diverge or spread out. As a result, the images formed by convex mirrors appear smaller and farther away than they actually are.

One of the most notable characteristics of a convex mirror is its ability to provide a wider field of view compared to flat or concave mirrors. This makes them useful in various applications, especially in enhancing safety and visibility. Convex mirrors are commonly used as "traffic mirrors" or "safety mirrors" on roads, driveways, parking lots, and in tight corners, allowing drivers to see around blind spots and observe oncoming traffic or pedestrians more easily.