Is the Rearview Mirror Convex or Concave?

[DelLucille]

The rearview mirrors on motor vehicles are neither convex lenses nor concave lenses. They are generally flat mirrors, but some are convex mirrors, which can help expand the field of vision. Below is a relevant introduction: Functions of car rearview mirrors: Observing the road conditions behind, checking the rearview mirror during emergency braking, judging the distance from the following vehicle, and observing rear-seat passengers. Precautions for using rearview mirrors: When changing driving routes, such as parking, starting, overtaking, turning, or making a U-turn, observe the rearview mirror and give corresponding signals. During driving, vibrations of the vehicle body may cause changes in the position and angle of the rearview mirror, so pay attention and adjust it promptly. When passing through crowded places like markets or intersections, drive slowly and pay attention to the rearview mirror. Before applying predictive braking, observe the rearview mirror to note the position and relative speed of the following vehicle, and take appropriate braking measures to prevent rear-end collisions.