What type of mirror is the rearview mirror installed at the front of a car?

[SanMiranda]

Car mirrors installed outside the windows are convex mirrors. The relevant introduction about convex mirrors is as follows: Introduction 1: A spherical mirror that uses the outer side of a paraboloid as the reflecting surface is called a convex mirror. When parallel light rays are projected onto a convex mirror, the reflected rays diverge. If the reflected rays are extended backward in the opposite direction, they will converge and intersect at a point behind the mirror's surface. This point is the principal focus (F) of the convex mirror, which is a virtual focus. Introduction 2: From a point (A) on an object, draw a line parallel to the principal axis as the incident ray. When the incident ray reaches the surface of the spherical mirror, it reflects, and the reflected ray travels in the opposite direction. This reflected ray must pass through the principal focus (F).