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Photonics Dictionary

active element

In various fields of science and technology, an active element typically refers to a component or substance that actively participates in or facilitates a process, operation, or reaction. Here are some specific contexts where the term is commonly used:

Electronics: In electronic circuits, an active element is a component that can control the flow of electrical current. This includes devices like transistors, diodes, and operational amplifiers, which are capable of amplifying signals, switching currents, or performing other functions essential to electronic devices.

Chemistry: In chemical reactions, an active element is a substance that directly participates in the reaction by undergoing chemical changes or catalyzing reactions. For example, catalysts in chemical reactions are considered active elements because they accelerate the reaction without being consumed.

Biology: In biological systems, active elements can refer to molecules, enzymes, or proteins that play a crucial role in metabolic processes, cellular functions, or physiological responses.

Materials science: In the context of materials and composites, an active element may refer to substances added to enhance or modify the properties of a material, such as reinforcing agents in polymers or metals that improve strength, conductivity, or other characteristics.

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