Light-Emitting Diode - GCSE Physics Definition

Reviewed by: Caroline Carroll

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A Light-Emitting Diode, commonly referred to as an LED, is a semiconductor device that emits light when an electric current passes through it. Unlike traditional light bulbs, LEDs do not have a filament, and can only work when placed in a specific direction within a circuit. LEDs are known for their energy efficiency, long lifespan, and small size, making them widely used in various applications, from indicator lights to large-scale lighting systems.

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Caroline Carroll

Reviewer: Caroline Carroll

Expertise: Physics & Chemistry Subject Lead

Caroline graduated from the University of Nottingham with a degree in Chemistry and Molecular Physics. She spent several years working as an Industrial Chemist in the automotive industry before retraining to teach. Caroline has over 12 years of experience teaching GCSE and A-level chemistry and physics. She is passionate about creating high-quality resources to help students achieve their full potential.

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