Why do we prefer a convex mirror as a rear-view mirror in vehicles?

Convex mirrors bulge outward, which makes things look smaller but lets you see a much wider area behind you. This wide view helps drivers spot vehicles coming from the sides.

Convex mirrors are preferred as rear-view mirrors in vehicles for the following reasons: 1. Wider field of view — A convex mirror curves outward, allowing it to capture light from a wider angle. This gives the driver a broader view of traffic behind and to the sides. 2. Always erect image — Convex mirrors always produce erect (upright) images regardless of the object distance. This is essential for the driver to correctly interpret the position of other vehicles. 3. Diminished image — The image is always diminished, which means more area fits into the mirror's small surface. 4. Safety — The combination of wider view and erect image helps drivers make safer lane changes and detect approaching vehicles from the rear. Note: While the image is smaller (which is a trade-off), the benefit of the wider field of view outweighs the size reduction for safety purposes.