A spherical mirror is a curved mirror that has the same radius of curvature in every direction. It is a type of concave mirror, meaning it is curved inward. The most common type of spherical mirror is the convex mirror, which has a bulging outward curved surface. This type of mirror is used to reflect light outward and provide a wide field of view. Other types of spherical mirrors include concave mirrors, which have a curved inward surface that reflects light inward, and plano – concave mirrors, which have a flat surface on one side and a curved inward surface on the other.