Optics
Optics is one of the branches of physics that describes the characteristics and properties of light and light relationships with matter. Optics also describes the optical phenomenon. The optical field usually illustrates the nature of visible light, infrared and ultra violet; but because light is electromagnetic waves, the same symptoms also occur in X-rays, microwaves, radio waves, and other forms of electromagnetic radiation. Thus, optics can be regarded as a small field in electromagnetism. some optical phenomena rely on the quantum properties of light that relate this field to quantum mechanics. Additionally, most optical phenomena can be calculated by electromagnetic illumination to light as in Maxwell's Equation. Optical fields are often separate from the community of physicists. It has its own introduction, community and conference. Pure science aspect of the field is called optical engineering. The application of optical engineering related to the lighting system is called lighting engineering. Each of these fields tends to have different uses, technical skills, focus, and professional mergers.