LEDs, electronic components and wires assembled on a circuit board. LEDs (light emitting diodes) are made of two thin film layers of semiconducting ma

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LEDs, electronic components and wires assembled on a circuit board. LEDs (light emitting diodes) are made of two thin film layers of semiconducting material impregnated with impurities that create opposite electrical properties. Passing an electric current through an LED makes it produce light. The colour of the light depends upon the semiconducting material used.

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Photo credit: © CORDELIA MOLLOY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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