The branch of physics dealing with the study of optical phenomena is called optics. This can be divided into two categories, ray optics and wave optics. Wave optics describes the connection between waves and rays of light. The wave theory of light was put forth by Huygen and later modified by Frensel. In this unit we come across the various phenomena related to the wave nature of light.
The brilliant colour of our national bird is due to an important property exhibited by reflected light waves from the fine ribbings on the features.
