Convex mirrors are preferred for rear-view mirrors because they always provide an erect image (upright) of the objects behind, although diminished in size. This characteristic ensures a more natural and intuitive perception for the driver.

The ray of light appears to diverge from the principal focus located on the same side of the lens.

The ray of light converges and passes through the principal focus on the other side of the convex lens.

The two spherical surfaces in a lens are part of spheres, and their centres are known as centres of curvature (C1 and C2). These centres play a crucial role in defining the optical properties of the lens.

Knowing the focal length of a lens is crucial in optics because it determines the lens’s ability to converge or diverge light. Focal length plays a key role in image formation, magnification, and the overall behavior of lenses in optical ...