Light physics is the study of how light behaves and interacts with matter. Light is a form of electromagnetic radiation that travels in waves and can be described by its wavelength and frequency. It can be seen in various forms, such as visible light, ultraviolet, and infrared. Understanding light helps explain phenomena like reflection, refraction, and dispersion. One important concept in light physics is the wave-particle duality, which means that light exhibits both wave-like and particle-like properties. This duality is crucial for understanding how light interacts with atoms and molecules, leading to applications in technologies like lasers and fiber optics.