1) Light rays reflect off mirrors according to the law of reflection, where the incident ray, reflected ray, and normal to the surface all lie in the same plane and the angle of incidence equals the angle of reflection. 2) Plane mirrors form upright, virtual images that are the same size as the object and located an equal distance behind the mirror as the object is in front. 3) Spherical mirrors can be either concave or convex. Concave mirrors form real, enlarged images of objects placed between the focal point and mirror, while convex mirrors form virtual, diminished images.