As from my opinion we should firstly know what is optics? Optics is a branch of physics that deals with electromagnetic radiation (for example, light and infrared radiation), its interactions with matter. Visible light is the part of electromagnetic waves that we see with our own eyes but there is also ultraviolet rays that we don’t see with our eyes, as well as x-rays and gamma rays. Today we take all the different ways that optics impact our daily life. Because optics is all around us. BENDING LIGHT Light exists as both wave and particle, it travels very fast. But what the real fact about the light bends? For example, reflection is the act of light bending off materials. When the light touches the surface it can’t travel further, it’s bounced back to the surface. When it hits smooth surfaces it reflects with same angles, like a mirror. But when it hits with the rough surface it reflects back with different angles, scattering of light all over. Most surfaces are not smooth, they diffuse the light in this way How can you tell? Well if you can see yourself being reflected back on the surface of the object, it’s smooth. If you can’t see yourself then it’s rough. Refraction is another way to light bends but this time, it bends as it travels through the materials instead of reflecting back. The light bend because, although it can travel through these materials, it slows down considerably and changes its path.This one you can try at home: get a straw in a glass of water. Look at the straw from the side and it looks like it splitted in two! There is nothing bent about your straw but rather the light waves are bent. . The importance of optics in our daily life are as follows:- • The phenomena that depend on the fact that light has both wave and particle nature. The explanation of these effects requires quantum mechanics. When considering light is particle-like properties, and the light is modelled as a collection of the particles known as "photons". The Quantum optics deals with the application of quantum mechanics to the optical systems.
Optics is studied in many related disciplines various including astronomy, engineering fields, photography, and medicine. The practical applications of these optics are found in everyday life in a variety of technology and objects including mirror, lenses, telescopes, Periscope, microscope, camera, lasers and fibre optics. The human eye is the most amazing optical system. The eye is a compound optical system composed of cornea and lens. It is an adaptive optical system because the crystalline lens changes their shape to focus the light from the object at a large range of distances on the retina.