What type of mirror is in a car?

Automotive rearview mirrors are primarily categorized into three types: interior rearview mirrors, exterior rearview mirrors, and under-view mirrors. Based on their mirror structure and functional features, they can be further subdivided into plane mirrors, convex mirrors, dual-curvature mirrors, wide-angle rearview mirrors, anti-glare rearview mirrors, and electronic rearview mirrors. The interior rearview mirror is typically installed at the centre top of the front windshield and employs a plane mirror design, providing a clear view of the road directly behind the vehicle to help assess the distance of following vehicles. Exterior rearview mirrors are positioned near the side doors or A-pillars and often utilize convex or dual-curvature mirrors to widen the side and rear field of vision, which is essential for lane changes or turns. Under-view mirrors are used to detect obstacles beneath the front of the vehicle, making them particularly useful in narrow spaces. Electronic rearview mirrors transmit images via cameras to an in-car display, maintaining clear visibility in adverse weather conditions, though they come with higher costs and depend on electronic systems. Proper adjustment of each type of rearview mirror is crucial for optimal performance. For instance, the interior rearview mirror should be positioned so the horizon is centered, while exterior mirrors should show approximately one-quarter of the vehicle's side with the horizon aligned in the middle. Collectively, these mirrors form a visual safety system for driving, and drivers should select the appropriate types based on their needs and perform regular maintenance.