How it Works? The most common laser diode generates semiconductor or injection laser. In these lasers, a population of Inversion Electrons is produced by applying a voltage across its p-n junction.

LED printers start by creating a line-by-line image of the page that they will be printing. A 600 dot-per-inch LED printer designed to print on 8.5-inch-wide letter-sized paper has a row of 4,800 ...

LED stands for Light Emitting Diode. These diodes release specific wavelengths of light that can penetrate the skin at different depths, triggering various biological processes.

The simple Diode and LED Tester presented here costs under £5 to build (including all components, the battery and a cheap case) and will indicate the polarity of almost all types ...

In many cities today, streets are lit by white lights, screens show vivid colors, and buildings glow with precise patterns of illumination, all depending on a small but important invention from the ...