Curved Mirrors We can define two general types of spherical mirrors. If the reflecting surface is the outer side of the sphere, the mirror is called a convex mirror. If the inside surface is the reflecting surface, it is called a concave mirror. Symmetry is one of the major hallmarks of many optical devices, including mirrors and lenses. "Mirror, mirror on the wall, who's the fairest of them all?" We've all heard this dialogue from Snowwhite and the seven dwarfs. But what kind of mirror was it? What were the properties that enabled these spherical mirrors to be so special? Well, let us find answers to it in this section. Question of Class 10-Some Important Terms Related To Spherical Mirrors : Find the important Terms Related To Spherical Mirrors like centre of curvature, radius of curvature, pole, principal axis, aperture at Physics Wallah. Curved mirrors come in two basic types: those that converge parallel incident rays of light and those that diverge them. Spherical mirrors are a common type.