LEDs are two-terminal electronic devices, and are a special type of diode. The first modern LEDs were created by engineer Nick Holonyak in 1962 at General Electric. When electrons cross part of the diffusion region of a diode (an area called the band gap), a photon is emitted. The size of the band gap determines the wavelength (color) of the photon. LEDs are available in many wavelengths ranging from infrared to ultraviolet.
- Dimensions: 12″ x 2.5″ x 2.5″; 31cm x 6.5cm x 6.5cm
- Weight: 0.1 lbs; 45g