Light is a form of energy that allows us to see objects. When light reflects off objects and enters our eyes, we see the objects. There are different types of reflection including irregular reflection, which scatters light in all directions, and regular reflection, which forms images. Spherical mirrors can be either concave or convex. Concave mirrors converge light to a focal point, while convex mirrors diverge light. The behavior of light reflecting off spherical mirrors follows formulas relating focal length, object distance, and image distance.