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...] and is used in a wide variety of applications including [[Light Emitting Diodes]] (LEDs) and [[Liquid Crystal Displays]] (LCDs). ...It was first used in the early 20th century to describe the phenomenon of light emission from a material under the influence of an electric field.

The first types of diodes were created in the early 20th century with the development of radio and th === Types of Diodes ===

...medical therapy]] that uses low-level (low-power) lasers or light-emitting diodes to alter cellular function. Pronounced as /loʊˈlɛvəl ˈleɪzər θɛrə ...ived from its use of low-power lasers. The term "laser" is an acronym for "Light Amplification by Stimulated Emission of Radiation". The term "therapy" is d

...term is derived from the Greek words "kytos" meaning cell, "lumen" meaning light, and "therapy" meaning treatment. ..." is derived from three Greek words: "kytos" meaning cell, "lumen" meaning light, and "therapy" meaning treatment.

...nates from the Old French ''lampe'' and Latin ''lampas'', meaning torch or light. In a medical context, it is often used metaphorically to refer to tools or ...ogy to detect certain skin conditions that may not be visible under normal light.

...The term is derived from the English words "dark," meaning the absence of light, and "therapy," meaning treatment. ...compound word. "Dark" comes from the Old English "deorc," meaning "without light," and "therapy" comes from the Greek "therapeia," meaning "healing."

...of lamp which produces ultraviolet (UV) light. This short-wave ultraviolet light disrupts DNA base pairing, causing formation of pyrimidine dimers, and lead ...dal lamps: low pressure lamps, medium pressure lamps, and [[Light Emitting Diodes|LEDs]].

* [[Light Emitting Diodes (LED)]]: A semiconductor light source that emits light when current flows through it. ...mp (CCFL)]]: A type of body usually used as long-lasting, energy-efficient light sources for electronic devices like computers and televisions.

...il a desired bedtime is reached. Light therapy uses exposure to artificial light to shift the timing of the body's internal clock. ...ngths of light using polychromatic polarised light, lasers, light-emitting diodes, fluorescent lamps, or dichroic lamps.

...medical therapy]] that uses low-level (low-power) lasers or light-emitting diodes to alter cellular function. Pronounced as /loʊˈlɛvəl ˈleɪzər θɛrə The use of light for healing has a long history. The modern development of LLLT began in the

Gallium is used in semiconductors and light-emitting diodes (LEDs). It is also used in the production of [[photovoltaic cells]], which