Produced in
partnership with:
Brought
to you by:
Testapedia Glossary

LED (Light-Emitting Diode)


Term
LED (Light-Emitting Diode)

Abbreviation
LED

Definition
LED (Light-Emitting Diode) is a semiconductor device that emits visible light when an electric current passes through it. The light is not particularly bright, but in most LEDs it is monochromatic, occurring at a single wavelength. The output from an LED can range from red (at a wavelength of approximately 700 nanometers) to blue-violet (about 400 nanometers).

Taxonomy Associations