CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
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.
Model release not required. Property release not required.