ABSTRACT
The phenomena of reflection and refraction are among the oldest properties of light that had attracted attention. With the current perception of the particle and wave-like models of light that underlie geometric and wave optics, we can say that both reflection and refraction of light are well understood. However, geometric optics, which adopts straight line propagation of light, offers a simpler, clearer, and more concise description of both phenomena. This chapter starts with defining these phenomena and presents some rules that govern a sign convention that facilitates the understanding of the various features that surround the formation of images from these effects. Of interest to us are the position, size, and nature of the formed images.
