Convex mirrors are preferred in vehicles primarily because they provide a wider field of view. Convex mirrors diverge light beams, allowing them to reflect a bigger scene. This implies that drivers can see more of the road and their surroundings, reducing blind spots significantly.
Convex mirrors produce upright images, however concave mirrors can produce inverted images depending on object distance. This is critical for making accurate and intuitive assessments while driving.
Their use on the passenger side allows drivers to identify vehicles in adjacent lanes, which is critical for safe lane changes and turns. Even while convex mirrors provide smaller pictures, they provide a full view, preventing accidents.
Convex mirrors help cover regions that flat mirrors cannot see, such as cars approaching from behind or to the side, particularly on narrow or congested roads.