Reflection takes place when light bounces off objects. Different surfaces reflect light in different ways. We learned earlier that non-luminous sources of light reflect light into our eyes. The direction of its reflection follows the law of incidence and reflection, which states that light bounces from a surface at the same angle as that of its arrival. The light ray event, the reflected light ray, and the normal interface at the point of incidence render an aircraft called the incidence plane.
Refraction or bending of light happens when light passes with a different refractive index from one medium to another medium. Refraction is an important feature of lenses, helping them to focus a light beam on a single point, and is also responsible for a number of common phenomena, such as the apparent distortion of objects partially submerged in water.