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We can define optics as science that involves the study of behaviour and properties of light, while it makes interaction with matter. It also includes the making of such instruments that help in its use and detection. It mostly involves the study of electromagnetic radiations like infrared, ultraviolet and visible.
We basically depend on optics for our daily work and performance. We have explored this world and universe by the help of various properties of light since the development of lenses in ancient Egypt. Further, the theories have advanced and led to various innovations creating a miracle to observe a different world by the use of instruments like microscope, telescope and fibre optics.
Some terms of interference, diffraction, polarization, reflection and refractions has added strength to its backbone. It has many medical benefits and is further helpful in therapeutical and surgeries of human tissues. It is thus a science of way beyond innovations and research.