Optics is an important sub-discipline of physics. It is also a discipline related to optical engineering technology. In a narrow sense, optics is the science of light and vision, and the word optics was used only in the early days for things related to the eye and vision. Optics is often said to be broad, and it is a science that studies the generation, propagation, reception and display of electromagnetic radiation in a wide range of wavelengths from microwaves, infrared, visible light, ultraviolet rays to X-rays and γ rays, as well as the interaction with matter, focusing on the research range from infrared to ultraviolet wavelengths. It is an important part of physics.
Optics is the physical discipline that studies the behavior and properties of light. Light is an electromagnetic wave, and in physics, electromagnetic waves are described by Maxwell's equations in electrodynamics; At the same time, light has wave-particle duality, and the particle nature of light needs to be described by quantum mechanics.
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