Is the Rearview Mirror a Convex Lens or a Concave Lens?

[VonGabriel]

Car rearview mirrors are neither convex lenses nor concave lenses, but convex mirrors. A convex mirror refers to a spherical mirror that uses the outer side of the sphere as the reflective surface, which is widely used in applications such as turn mirrors and wide-angle mirrors. The most common example is the rearview mirror, which utilizes the principle of light divergence to expand the field of vision. Relevant information about car rearview mirrors is as follows: Location: Car rearview mirrors are located on the left and right sides of the car's front and inside the car's interior. Function: Car rearview mirrors reflect the situation behind, beside, and below the car, allowing the driver to indirectly see these areas clearly. They serve as the 'second pair of eyes,' expanding the driver's field of vision.