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Optics

(optics)





See also list of optical topics .


Optics is a branch of physics that describes the behavior andproperties of light and the interaction of light with matter . Optics explains and is illuminated by optical phenomena .

The field of optics usually describes the behavior of visible , infrared and ultraviolet light;however since light is an electromagnetic wave , analogous phenomena occur in X-rays , microwaves , radio waves, and other formsof electromagnetic radiation .Optics can thus be regarded as a sub-field of electromagnetism . Some optical phenomena depend on the quantum nature of light and as such some areas of optics are also related to quantum mechanics .

Optics, however, as a field is often considered largely separate from the physics community. It has its own identity,societies, and conferences. The pure science aspects of the field are often called Optical Science or Optical Physics. Appliedoptical sciences are often called optical engineering. Applications of optical enginering related specifically to illuminationsystems is called illumination engineering. Each of these disciplines tends to be quite different in its applications, technicalskills, focus, and professional affiliations.

Because of the wide application of the science of "light" to real-world applications, the area of optical science, and opticalengineering tends to be very cross-disiplinary. You will find optical science a part of many related disciplines includingelectrical engineering, physics, psychology, medicine, and others.

Contents

Classical optics

Classical or geometric optics, sometimes called ray optics is the branch of opticsthat describes light propagation interms of rays. Rays are bent at the interface between two dissimilar media, andmay be curved in a medium in which the refractive index is a function of position. The ray in geometricoptics is perpendicular to the wavefront in physical optics .

Modern optics

Modern Optics is a term used to describe areas of optical science and engineering that became popular in the 20th century.These areas of optical science typically relate to the electromagnetic or quantum properties of light but do include othertopics.

Other optical fields

Everyday optics

Optics is part of everyday life. Rainbows and appearances of fata Morgana or the green ray areexamples of optical phenomena .

Wikibooks modules


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